{"title":"Suspension \u0026 Springs","description":null,"products":[{"product_id":"double-eye-leaf-spring-for-3-500-lb-axle","title":"Double Eye Leaf Spring for 3,500 lb Axle","description":"\u003cp\u003eThe supplied double-eye spring entry lists a 25-1\/4-inch eye-to-eye distance, 1.75-inch width and four leaves. The table gives 1,750 lbs as capacity, separately from its 3,500-lb axle application label.\u003c\/p\u003e\u003ch2\u003eListed details\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e1,750 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye to Eye Distance\u003c\/th\u003e\n\u003ctd\u003e25-1\/4″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye Diameter\u003c\/th\u003e\n\u003ctd\u003e9\/16″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBushing\u003c\/th\u003e\n\u003ctd\u003eIncluded: Nylon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Leaves\u003c\/th\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStack Height\u003c\/th\u003e\n\u003ctd\u003e1.27″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpring Width\u003c\/th\u003e\n\u003ctd\u003e1.75″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eThese details are transcribed from the supplied listing and await manufacturer verification.\u003c\/p\u003e\u003ch2\u003eBefore selecting this part\u003c\/h2\u003e\u003cp\u003eConfirm whether capacity refers to one spring and how the eye spacing is measured. Compare bushing and bolt dimensions, and do not treat a changed spring as an increase to the trailer rating.\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52955699642584,"sku":"05-AXSP01","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_Fwd_Leaf_Springs_cmcbride_trailersplus_com_TrailersPlus_Mail_7d31ecaae972.webp?v=1794442999"},{"product_id":"double-eye-leaf-spring-for-5-200-lb-axle","title":"Double Eye Leaf Spring for 5,200 lb Axle","description":"\u003cp\u003eThis double-eye spring source lists 2,600 lbs capacity, a 25-1\/4-inch eye spacing and a 1.44-inch stack height. Its dimensions and rating differ from the lighter spring even though both have four leaves.\u003c\/p\u003e\u003ch2\u003eListed details\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e2,600 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye to Eye Distance\u003c\/th\u003e\n\u003ctd\u003e25-1\/4″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye Diameter\u003c\/th\u003e\n\u003ctd\u003e9\/16″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBushing\u003c\/th\u003e\n\u003ctd\u003eIncluded: Nylon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Leaves\u003c\/th\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStack Height\u003c\/th\u003e\n\u003ctd\u003e1.44″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpring Width\u003c\/th\u003e\n\u003ctd\u003e1.75″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eThese details are transcribed from the supplied listing and await manufacturer verification.\u003c\/p\u003e\u003ch2\u003eBefore selecting this part\u003c\/h2\u003e\u003cp\u003eCompare spring width, stack height and the manufacturer's unloaded measurement method. Confirm the rating definition and suspension geometry before substituting this spring.\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52955699708120,"sku":"05-AXSP02","price":77.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_Replacement_Leaf_Springs_cmcbride_trailersplus_com_TrailersP_860e1f1ef343.webp?v=1794443000"},{"product_id":"tandem-axle-equalizer","title":"Tandem Axle Equalizer","description":"\u003cp\u003eThe source equalizer entry gives a 5-5\/8-inch spring-hole-center measurement and 9\/16-inch center and end holes. It also lists a 2-inch hanger-mount-to-spring-mount height.\u003c\/p\u003e\u003ch2\u003eListed details\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAxle Spacing\u003c\/th\u003e\n\u003ctd\u003e33″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits Spring Width\u003c\/th\u003e\n\u003ctd\u003e1.75″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCenter Hole Size\u003c\/th\u003e\n\u003ctd\u003e9\/16″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnd Hole Size\u003c\/th\u003e\n\u003ctd\u003e9\/16″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpring Hole Center\u003c\/th\u003e\n\u003ctd\u003e5-5\/8″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHanger Mount to Spring Mount Height\u003c\/th\u003e\n\u003ctd\u003e2″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eThese details are transcribed from the supplied listing and await manufacturer verification.\u003c\/p\u003e\u003ch2\u003eBefore selecting this part\u003c\/h2\u003e\u003cp\u003eCompare the complete equalizer geometry with the suspension drawing. Confirm bushings, bolts and supplied hardware individually; equal axle spacing does not prove that the suspension geometry matches.\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52955699773656,"sku":"05-HKM004","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_05-HKM004-1__57232_81527cecda65.webp?v=1794443001"},{"product_id":"single-eye-leaf-spring-for-7-000-lb-axle","title":"Single Eye Leaf Spring for 7,000 lb Axle","description":"\u003cp\u003eThis single-eye spring entry records a 26-1\/8-inch eye-to-slipper distance, 2-inch width and five leaves. The source capacity field is 3,500 lbs.\u003c\/p\u003e\u003ch2\u003eListed details\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e3,500 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye to Slipper Distance\u003c\/th\u003e\n\u003ctd\u003e26-1\/8″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye Diameter\u003c\/th\u003e\n\u003ctd\u003e9\/16″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBushing\u003c\/th\u003e\n\u003ctd\u003eIncluded: Nylon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Leaves\u003c\/th\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpring Width\u003c\/th\u003e\n\u003ctd\u003e2″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eThese details are transcribed from the supplied listing and await manufacturer verification.\u003c\/p\u003e\u003ch2\u003eBefore selecting this part\u003c\/h2\u003e\u003cp\u003eCompare the slipper end shape and hanger contact arrangement as well as eye diameter. This end style must be matched to the suspension; it is not a direct substitute for a double-eye spring.\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52955699806424,"sku":"05-AXSP10","price":162.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_05-AXSP10-1__17504_63c64a7e0385.webp?v=1794443001"},{"product_id":"12-500-20-000lb-shock-absorb-damper-for-demco-surge-actuators-da91-da10-da16-da20","title":"12,500-20,000lb Shock Absorb Damper for Demco Surge Actuators (DA91, DA10, DA16, DA20)","description":"\u003cp\u003eThis is a Manufacturer’s replacement Shock Absorber for Demco Model Actuators in the 12,500lb – 20,000lb Capacity Range. This range includes models DA91, DA10, DA16, and DA20.  This Trailer Hydraulic Shock Damper by Demco measures 9 Inches Long in total, and retracts 2 inches, to a measurement of 7 inches long.\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963221602520,"sku":"26818","price":44.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_shock-absorber-23853-k_c4919487c18a.webp?v=1794460032"},{"product_id":"005961-76-support-equalizer","title":"005961 – 76″ Support Equalizer","description":"\u003cp\u003eThe 005961 Support Equalizer is a key component in a trailer’s suspension system, distributing weight evenly across axles to enhance stability and performance during transport.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003eDistributes weight across trailer axles\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eImproves stability and handling\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eEssential for suspension system efficiency\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e72.25 inches\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eWidth:\u003c\/strong\u003e1.41 inches\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e3 inches\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e005961\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963221799128,"sku":"005961","price":22.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_005961__89142_58beefcf7a75.webp?v=1794460033"},{"product_id":"1-1-2-inch-diagonal-galvanized-boat-trailer-leaf-spring-u-bolt-kit","title":"1 1\/2 inch Diagonal Galvanized Boat Trailer Leaf Spring U-Bolt Kit","description":"\u003cp\u003eThis Hot Dipped Galvanized trailer axle U-Bolt Kit is designed to be used with 1 1\/2 inch Square 1400lb capacity axles and mounts diagonally across the axle holding the leaf springs on. The leaf spring u bolt kit includes (2) Galvanized 1\/2 inch diameter u bolts that are 2 5\/8 inch wide inside and 3 9\/16 inches long. Also included in this kit are (2) mounting plates, (4) nuts, (4) washers, and (4) lock washers.\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963221930200,"sku":"24398","price":11.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_galvdiagonaluboltkit-112-assembled-btp_a67b468babfd.webp?v=1794460033"},{"product_id":"071500-non-adj-torque-arm","title":"071500 – Non Adj Torque arm","description":"\u003cp\u003eThe 071500 Non-Adjustable Torque Arm is a heavy-duty suspension component designed to maintain proper axle alignment and control movement under load. Commonly used in trailer suspension systems, this rigid torque arm helps reduce axle shift and maintain consistent ride height without the need for adjustment.\u003c\/p\u003e \u003cp\u003eFeatures:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eFixed-length, non-adjustable torque arm\u003c\/li\u003e \u003cli\u003eProvides axle stability and alignment\u003c\/li\u003e \u003cli\u003eHeavy-duty steel construction for durability\u003c\/li\u003e \u003cli\u003eDesigned for use in trailer suspension systems\u003c\/li\u003e \u003cli\u003eEasy to install with standard hardware (Sold Separately)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSpecifications:\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePart Number: 071500\u003c\/li\u003e \u003cli\u003eType: Non-adjustable torque arm\u003c\/li\u003e \u003cli\u003eMaterial: High-strength steel\u003c\/li\u003e \u003cli\u003eLength: Fixed 19-1\/4″\u003c\/li\u003e \u003cli\u003eMounting: Bolt-on with bushing ends (Hardware Sold Separately)\u003c\/li\u003e \u003cli\u003eApplication: Trailer suspension systems, tandem\/tridem axle setups\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eFitment:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCompatible with many heavy-duty trailer suspension systems\u003c\/li\u003e \u003cli\u003eCommonly used in Dexter, Hutch, and other multi-axle systems\u003c\/li\u003e \u003cli\u003eIdeal for flatbed, utility, and commercial trailers\u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222028504,"sku":"0f7f99376f02cabad225930240cddf01","price":62.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_HUT-715-00_-1_4fb72690f68b.webp?v=1794460034"},{"product_id":"38-undercarriage-angle-pk2513","title":"38″ UNDERCARRIAGE ANGLE PK2513","description":"\u003cul\u003e \u003cli\u003e38″UNDER CARRIAGE ANGLE SINGLE AXLE FOR 14″ TIRES\u003c\/li\u003e \u003cli\u003eUSED ON ALUMINUM TRAILERS\u003c\/li\u003e \u003cli\u003eMOUNTS ON OUTSIDE OF FRAME\u003c\/li\u003e \u003cli\u003eFITS LEFT OR RIGHT SIDE\u003c\/li\u003e \u003cli\u003e10″ STEP BARS FOR 10″ ALUMINUM STEP PADS\u003c\/li\u003e \u003cli\u003eUSE 25-1\/4″ DOUBLE EYE SPRINGS\u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222094040,"sku":"PK2513","price":128.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_PK2513FORWEB_ae6d53503cd2.webp?v=1794460035"},{"product_id":"12426-dampener-shock","title":"12426 – Dampener Shock","description":"\u003cp\u003eThe 12426 Dampener Shock is a direct-fit replacement for all Demco hydraulic brake actuators, designed to absorb shock and reduce harsh vibrations during braking and towing. This high-performance component enhances towing stability and extends the life of your actuator and trailer components. It’s built to OEM specifications and shown as #6 in the diagram. \u003c\/p\u003e \u003cp\u003eFeatures:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCompatible with all Demco hydraulic brake actuators\u003c\/li\u003e \u003cli\u003eReduces shock and vibration during towing\u003c\/li\u003e \u003cli\u003eImproves brake response and actuator longevity\u003c\/li\u003e \u003cli\u003eEasy to install with standard hardware\u003c\/li\u003e \u003cli\u003eOEM quality and fit\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSpecifications:\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePart Number: 12426\u003c\/li\u003e \u003cli\u003eApplication: Dampener Shock for Demco actuators\u003c\/li\u003e \u003cli\u003eSmall Ring Inside Diameter: 5\/8″\u003c\/li\u003e \u003cli\u003eLarge Ring Inside Diameter: 7\/8″\u003c\/li\u003e \u003cli\u003eCollapsed Length (Center to Center): 6″\u003c\/li\u003e \u003cli\u003eExtended Length (Center to Center): 8″\u003c\/li\u003e \u003cli\u003eBody Diameter: 1-5\/8″\u003c\/li\u003e \u003cli\u003eDiagram Reference: Shown as #6\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eFitment: \u003c\/p\u003e \u003cul\u003e \u003cli\u003eFits all Demco surge brake actuators\u003c\/li\u003e \u003cli\u003eIdeal for boat, utility, and equipment haulers using Demco Systems\u003c\/li\u003e \u003cli\u003eDesigned to restore smooth actuator operation\u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222290648,"sku":"12426","price":43.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_12426_f_co_rgb__12083_fea3644c1a3d.webp?v=1794460035"},{"product_id":"005962-76-support-shackle","title":"005962 – 76″ Support Shackle","description":"\u003cp\u003eThe 005962 Support Shackle plays a vital role in a trailer’s suspension system, providing stability and controlling movement to absorb shocks and vibrations during travel.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003eEnhances suspension stability\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eControls movement to absorb shocks\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eDurable construction for longevity\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e79.25 inches\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eWidth:\u003c\/strong\u003e1.41 inches\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e3 inches\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e005962\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222356184,"sku":"005962","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_005962__30997_6f21a413fa9a.webp?v=1794460037"},{"product_id":"10gdh-rear-4-5-tall-slipper-spring-hanger","title":"10GDH-REAR – 4.5″ Tall Slipper Spring Hanger","description":"\u003cp\u003eThe 10GDH-REAR is a heavy-duty rear hanger designed for trailers equipped with 10,000 lb General Duty (10GD) axles.Engineered to accommodate 2-1\/2″ wide slipper springs, this hanger ensures optimal alignment and load distribution between axles, enhancing the durability and performance of your trailer’s suspension system.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003eDesigned for 2-1\/2″ wide slipper springs\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e4-1\/2″ from center of hole to top of hanger\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eConstructed from high-strength steel for durability\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eBuilt-in slipper support for enhanced stability\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eCorrosion-resistant finish for extended service life\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e10GDH-REAR\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003eHigh-strength steel\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eFinish:\u003c\/strong\u003eCorrosion-resistant coating\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eSpring Compatibility:\u003c\/strong\u003e2-1\/2″ wide slipper springs\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eBolt Hole Diameter:\u003c\/strong\u003e 1″\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eHeight (Top to Center of Hole):\u003c\/strong\u003e4-1\/2″\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eMounting Position:\u003c\/strong\u003e Rear\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222421720,"sku":"10GDH-REAR","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_10GDH-REAR__83811_c7c2dc742928.webp?v=1794460037"},{"product_id":"090747-3-4-spring-eye-bolt-w-nut","title":"090747 – 3\/4″ Spring Eye Bolt w\/ Nut","description":"\u003cp\u003eThe 090747 Spring Eye Bolt w\/ Nut is a critical suspension component used to secure leaf spring eyes to trailer equalizers or hangers. Crafted from high-strength steel and supplied with a matching hex nut, this bolt ensures a robust, vibration-resistant connection for smooth, reliable trailer performance. \u003c\/p\u003e \u003cp\u003eFeatures:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e3\/4″ diameter bolt sized for standard spring eyes\u003c\/li\u003e \u003cli\u003eIncludes matching locknut for secure installation\u003c\/li\u003e \u003cli\u003ePrecision-machined eye end for proper spring alignment\u003c\/li\u003e \u003cli\u003eHeavy-duty steel construction with corrosion-resistant finish\u003c\/li\u003e \u003cli\u003eEssential for maintaining suspension integrity and ride quality\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSpecifications:\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePart Number: 090747\u003c\/li\u003e \u003cli\u003eBolt Diameter: 3\/4″\u003c\/li\u003e \u003cli\u003eThread Pitch: 16 TPI (fine thread)\u003c\/li\u003e \u003cli\u003eOverall Length: 4-1\/2″\u003c\/li\u003e \u003cli\u003eEye Inner Diameter: Fits up to 1″ spring eye bushing\u003c\/li\u003e \u003cli\u003eMaterial: Hardened alloy steel\u003c\/li\u003e \u003cli\u003eFinish: Phosphate-coated for rust protection\u003c\/li\u003e \u003cli\u003eIncludes: (1) Spring eye bolt and (1) hex locknut\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eFitment:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCompatible with most utility and equipment trailers using 3\/4″ spring eye bolts\u003c\/li\u003e \u003cli\u003eWorks with common brands like Dexter, Lippert, and Marinco\u003c\/li\u003e \u003cli\u003eIdeal for single, tandem, and tridem axle leaf-spring suspensions\u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222487256,"sku":"90747","price":8.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_090747090637_d053ec2f217c.webp?v=1794460038"},{"product_id":"adj-rod-center-shaft-9-5-long","title":"ADJ ROD CENTER SHAFT 9.5″ LONG","description":"\u003cp\u003eADJ ROD CENTER SHAFT 9.5″ LONG\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222585560,"sku":"HUT-716-01","price":12.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_HUT-716-01__78528_91903483a2b0.webp?v=1794460038"},{"product_id":"7-000lb-shock-absorb-damper-for-demco-surge-actuators-da66-da66l","title":"7,000lb Shock Absorb Damper for Demco Surge Actuators (DA66 \u0026 DA66L)","description":"\u003cp\u003eThis is a Manufacturer’s replacement Shock Absorber for Demco Model Actuators in the 12,500lb – 20,000lb Capacity Range. This range includes models DA66 and DA66L.  This Trailer Hydraulic Shock Damper by Demco measures 7 Inches Long in total, and retracts 1 1\/2 inches, to a measurement of 5 1\/5 inches long.\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222683864,"sku":"26817","price":62.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_shock-absorber-26817-a_227f317ffbb6.webp?v=1794460039"},{"product_id":"090746-1-14-equalizer-bolt","title":"090746 – 1″-14 Equalizer Bolt","description":"\u003cp\u003eThe 090746 Equalizer Bolt is a heavy-duty suspension component used to secure equalizers in trailer suspension systems. With a 1″-14 fine thread, this bolt ensures a strong, tight connection, helping maintain proper alignment and motion between leaf springs and equalizers. Ideal for tandem or triple axle trailer configurations.\u003c\/p\u003e \u003cp\u003eFeatures:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e1″-14 fine thread equalizer bolt\u003c\/li\u003e \u003cli\u003eProvides a secure pivot point for trailer equalizers\u003c\/li\u003e \u003cli\u003eHeavy-duty steel construction for durability under load\u003c\/li\u003e \u003cli\u003ePrecision-machined threads for reliable torque and fit\u003c\/li\u003e \u003cli\u003eUsed in leaf spring suspension systems for multi-axle trailers\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSpecifications:\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePart Number: 090746\u003c\/li\u003e \u003cli\u003eThread Size: 1″-14 (fine thread)\u003c\/li\u003e \u003cli\u003eType: Equalizer bolt\u003c\/li\u003e \u003cli\u003eMaterial: Hardened Steel\u003c\/li\u003e \u003cli\u003eLength: 5-7\/8″\u003c\/li\u003e \u003cli\u003eFinish: Plain\u003c\/li\u003e \u003cli\u003eApplication: Trailer suspension systems with equalizers\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eFitment:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCompatible with Dexter, Lippert, and other trailer suspensions\u003c\/li\u003e \u003cli\u003eCommon in 5K-12K tandem and tridem axle trailers\u003c\/li\u003e \u003cli\u003eUsed with corresponding locknut (e.g., ) for secure installation\u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222749400,"sku":"90746","price":27.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_090746-Trailer-Suspension-Equalizer-Bolt_MED_6f2d64d5b92b.webp?v=1794460041"},{"product_id":"1203t3-3500-lb-5-leaf-slipper-spring-26-1-8-long","title":"1203T3 – 3500 LB, 5-Leaf Slipper Spring 26 1\/8″ Long","description":"\u003cp\u003eThe 1203T3 Slipper Spring is a heavy-duty 5-leaf leaf spring designed to provide reliable suspension support for trailers with a 3500 LB load capacity. Measuring 26 1\/8″ in length, this slipper spring is ideal for use in utility trailers, cargo haulers, and other applications requiring high strength and durability. Its design ensures smooth and efficient load distribution, helping to extend the lifespan of your trailer’s suspension system.\u003c\/p\u003e \u003cp\u003eFeatures:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCapacity: 3500 LB\u003c\/li\u003e \u003cli\u003eLeaf Count: 5-leaf design for enhanced durability and weight distribution\u003c\/li\u003e \u003cli\u003eLength: 26 1\/8″\u003c\/li\u003e \u003cli\u003eMaterial: High-strength steel\u003c\/li\u003e \u003cli\u003eDesign: Slipper spring for smooth suspension movement\u003c\/li\u003e \u003cli\u003eUsage: Suitable for trailers with 3500 LB load capacity\u003c\/li\u003e \u003cli\u003eMaintenance: Minimal maintenance required for long-lasting performance\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSpecifications:\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePart Number: 1203T3\u003c\/li\u003e \u003cli\u003eLeaf Spring Type: 5-Leaf Slipper Spring\u003c\/li\u003e \u003cli\u003eLength: 26 1\/8″\u003c\/li\u003e \u003cli\u003eWeight Capacity: 3500 LB\u003c\/li\u003e \u003cli\u003eMaterial: Steel\u003c\/li\u003e \u003cli\u003eThickness: Standard thickness for heavy-duty applications\u003c\/li\u003e \u003cli\u003eMounting Style: Slipper type (use with compatible hanger kits)\u003c\/li\u003e \u003cli\u003eApplication: Trailer suspension\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eApplications:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eDesigned for use in 3500 LB-rated trailers\u003c\/li\u003e \u003cli\u003eCommonly used in utility trailers, cargo trailers, flatbeds, and more\u003c\/li\u003e \u003cli\u003eCompatible with standard spring hangers and suspension systems\u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222814936,"sku":"1203T3","price":78.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_1203T3__11671_585838e89d87.webp?v=1794460045"},{"product_id":"1-2-square-stainless-steel-trailer-u-bolt-a-2-1-4-b-7-1-2","title":"1\/2″ Square Stainless Steel Trailer U-Bolt, A=2 1\/4″ B=7 1\/2″","description":"\u003cp\u003e\u003cstrong\u003eSquare Stainless Steel Trailer U-Bolts, 1\/2″ diameter w\/SS Nylon Lock Nuts\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eA Pacific Trailers exclusive, these Square bend Stainless Steel trailer U-Bolts are ideal for use in harsh marine environments providing the best protection against salt and brackish water. Great Replacement for ZINC or Painted\/Raw U-Bolts.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAll Stainless Steel construction\u003c\/li\u003e \u003cli\u003esquare bend 1\/2″ diameter material\u003c\/li\u003e \u003cli\u003estainless steel nylon locking nuts included\u003c\/li\u003e \u003cli\u003eperfect for salt or brackish water environments\u003c\/li\u003e \u003cli\u003euse thread lubricant when installing\u003c\/li\u003e \u003cli\u003eThread Length “C” generally is 1.5″ in length\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e When installing stainless steel U-Bolts, Bolts or Lug Nuts, DO NOT USE IMPACT TOOLS. Use hand tools only and remember to use a thread lubricant. Failure to follow these procedures may cause threads on stainless steel hardware to seize.\u003cbr\u003e Seized threads on Stainless Steel items are not a warranty condition!\u003c\/p\u003e \u003cp\u003e square bend stainless steel trailer u-bolts with nylon locking nuts.\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222880472,"sku":"U-Bolt 12 214-712SS","price":19.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_2186_resized_285fa860-e9fb-48cf-abf7-cbc493d568c5_20fbd1bc5cfa.webp?v=1794460045"},{"product_id":"alignment-block","title":"ALIGNMENT BLOCK","description":"\u003cp\u003eALIGNMENT BLOCK\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963222946008,"sku":"NEW-90008184","price":48.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_NEW-90008184__36039_e68942cdfbd0.webp?v=1794460046"},{"product_id":"air-bag","title":"AIR BAG","description":"\u003cp\u003eAIR BAG\u003c\/p\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963223011544,"sku":"HOL-BK-XB-SPN-053-60","price":170.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_HOL-BK-XB-SPN-053-60__54496_ce6d016493bb.webp?v=1794460047"},{"product_id":"1001943-74-crossmember-shackle-pan","title":"1001943 – 74″ Crossmember Shackle Pan","description":"\u003cp\u003eThe 1001943 74″ Crossmember Shackle Pan is an essential, heavy-duty component designed to provide stability and support for your trailer’s suspension system.Measuring 74 inches in length, this crossmember offers a secure foundation for suspension shackles, ensuring proper load distribution and smooth trailer operation.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003eProvides stability and support for suspension systems\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eEnsures proper load distribution\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eHeavy-duty construction for durability\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eDesigned for smooth trailer operation\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e1001943\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e74 inches\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eWidth:\u003c\/strong\u003e1.41 inches\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e3 inches\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003eSuitable for various trailer suspension systems\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963223077080,"sku":"1001943","price":40.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_1001943__95585_4bed9eeec259.webp?v=1794460047"},{"product_id":"13-140-3-2-1-2-slipper-spring-suspension-equalizer","title":"13-140-3 – 2-1\/2″ Slipper Spring Suspension Equalizer","description":"\u003cp\u003eThe 13-140-3 Suspension Equalizer is a heavy-duty link designed to balance load transfer between tandem axles on trailers. Built for 42 ¼″ center-to-center axle spacing, this equalizer ensures even weight distribution and smooth suspension articulation. Its universal design allows installation on either the right or left side, making it a versatile component for commercial, utility, and equipment trailers.\u003c\/p\u003e \u003cp\u003eFeatures:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003ePrecision-machined for consistent performance under heavy loads\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eUniversal fit—right or left hand installation\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eBuilt-in support for smooth spring articulation\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003eDurable powder-coat finish for corrosion resistance\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSpecifications:\u003c\/p\u003e   \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003eDimension \/ Feature\u003c\/th\u003e \u003cth\u003eValue\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eAxle Spacing (C–C)\u003c\/td\u003e \u003ctd\u003e42 ¼″ (1,073 mm)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eOverall Length (A)\u003c\/td\u003e \u003ctd\u003e18 ³⁄₈″ (467 mm)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSpring Eye Hole I.D. (B)\u003c\/td\u003e \u003ctd\u003e1″ (25.4 mm)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCenter Pivot Hole I.D. 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Great Replacement for ZINC or Painted\/Raw U-Bolts.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAll Stainless Steel construction\u003c\/li\u003e \u003cli\u003esquare bend 1\/2″ diameter material\u003c\/li\u003e \u003cli\u003estainless steel nylon locking nuts included\u003c\/li\u003e \u003cli\u003eperfect for salt or brackish water environments\u003c\/li\u003e \u003cli\u003euse thread lubricant when installing\u003c\/li\u003e \u003cli\u003eThread Length “C” generally is 1.5″ in length\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e When installing stainless steel U-Bolts, Bolts or Lug Nuts, DO NOT USE IMPACT TOOLS. Use hand tools only and remember to use a thread lubricant. 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At 26-1\/8″ long (eye center to slipper end), this spring provides smooth suspension travel, excellent load distribution, and minimal maintenance thanks to its integrated nylon bushing. \u003c\/p\u003e \u003cp\u003eFeatures:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e7-leaf construction for superior strength and load support\u003c\/li\u003e \u003cli\u003eSlipper-style design allows smooth articulation and reduces friction\u003c\/li\u003e \u003cli\u003eNylon bushing in the spring eye for quiet operation and long service life\u003c\/li\u003e \u003cli\u003ePowder-coat finish resists corrosion and wear\u003c\/li\u003e \u003cli\u003eIdeal for heavy-use utility, equipment, and cargo trailers\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSpecifications:\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePart Number: 1403T3\u003c\/li\u003e \u003cli\u003eLoad Rating: 4,000 lb. spring capacity (up to 8,000 lb. axle)\u003c\/li\u003e \u003cli\u003eLeaf Count: 7 leaves\u003c\/li\u003e \u003cli\u003eLength: 26-1\/8″ (from center of eye to end of slipper)\u003c\/li\u003e \u003cli\u003eWidth: 2″\u003c\/li\u003e \u003cli\u003eEye Inner Diameter: 9\/16″ (nylon-bushing)\u003c\/li\u003e \u003cli\u003eBushing Material: Nylon for low friction and noise reduction\u003c\/li\u003e \u003cli\u003eFinish: Black powder coat\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eFitment:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eRated for trailers up to 4,000 lb. per spring, 8,000 lb. per axle\u003c\/li\u003e \u003cli\u003eWorks with standard 9\/16″ spring eye bolts and hangers\u003c\/li\u003e \u003cli\u003eCommon on tandem axle utility, cargo, and equipment trailers\u003c\/li\u003e \u003c\/ul\u003e","brand":"Trailer Parts Mart","offers":[{"title":"Default Title","offer_id":52963223896280,"sku":"1403T3","price":95.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0898\/9144\/files\/01_1203T3__79237_c94d5cf28d14.webp?v=1794460054"},{"product_id":"1-2-square-stainless-steel-trailer-u-bolt-a-2-1-8-b-5","title":"1\/2″ Square Stainless Steel Trailer U-Bolt, A=2 1\/8″ B=5″","description":"\u003cp\u003e\u003cstrong\u003eSquare Stainless Steel Trailer U-Bolts, 1\/2″ diameter w\/SS Nylon Lock Nuts\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eA Pacific Trailers exclusive, these Square bend Stainless Steel trailer U-Bolts are ideal for use in harsh marine environments providing the best protection against salt and brackish water. 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Your leaf spring will more than likely be flattened out, or possibly broken.  -This Leaf Spring measures 1 3\/4 inches wide 9\/16 inch bushings come installed in the spring, these bushings are common on all types of trailers except boat trailers. If you are purchasing these for your boat trailer, you will need 1\/2 inch bushings to be installed. Click here to select Leaf Spring Bushings \u003cbr\u003e These springs can be used on both square tube or round tube trailer axles on boats or land trailers. The only difference is in the style of U-Bolt Required to mount the spring to the axle. Check the condition of your U-Bolts and the required size and check our U Bolt Kits out here. Leaf Spring U-Bolt Mounting Kits. Available in raw steel, hot-dipped galvanized, and stainless steel.  \u003cbr\u003e Commonly when replacing leaf springs, the spring bolts may also be needing replacement. 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This would bring a pair of these 20 inch Double Eye Trailer Springs to 3700 pounds. These are common on 3500 lb trailer axles.  Spring Measurements and Specs: Eye to Eye Measurement 20 1\/8 inches (Free Length Measurement) -Does your spring measure slightly more than 20 inches, lets say 20 3\/4 or so? You may have your trailer loaded, or the spring may be old and flattened out. It is not uncommon for leaf springs to measure longer than what the stock size is listed.  Free Arch Measurement (see picture) 3 1\/2 inches -The free arch measurement is based off a stock, brand new spring. Your leaf spring will more than likely be flattened out, or possibly broken.  -This Trailer Leaf Spring measures 1 3\/4 inches wide 9\/16 inch bushings come installed in the spring, these bushings are common on all types of trailers except boat trailers. If you are purchasing these for your boat trailer, you will need 1\/2 inch bushings to be installed which are available as an add on for this product.  \u003cbr\u003e These springs can be used on both square tube or round tube trailer axles on boats or land trailers. The only difference is in the style of U-Bolt Required to mount the spring to the axle. Check the condition of your U-Bolts and the required size and check our U Bolt Kits out here. Leaf Spring U-Bolt Mounting Kits. Available in raw steel, hot-dipped galvanized, and stainless steel.  \u003cbr\u003e Commonly when replacing leaf springs, the spring bolts may also be needing replacement. As stated before, if you are purchasing for a land trailer(not boat trailer) you will be using 9\/16 x 3 inch bolts , if this is for a boat trailer, check out zinc plated or stainless steel spring bolts that measure 1\/2 by 3 1\/2 inches Leaf Spring Bolts and Bushings If you are planning on replacing the hangers, (brackets that are either welded or bolted to frame that hold leaf spring) and shackles (2 shackles towards rear of spring assembly for single per side or 4 in the middle for tandem trailer per side) We have single and double spring hanger kits available for Weld On assemblies that include all the necessary replacement hardware. Weld on assemblies are more common on non marine trailers. 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Great Replacement for ZINC or Painted\/Raw U-Bolts.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAll Stainless Steel construction\u003c\/li\u003e \u003cli\u003esquare bend 1\/2″ diameter material\u003c\/li\u003e \u003cli\u003estainless steel nylon locking nuts included\u003c\/li\u003e \u003cli\u003eperfect for salt or brackish water environments\u003c\/li\u003e \u003cli\u003euse thread lubricant when installing\u003c\/li\u003e \u003cli\u003eThread Length “C” generally is 1.5″ in length\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e When installing stainless steel U-Bolts, Bolts or Lug Nuts, DO NOT USE IMPACT TOOLS. Use hand tools only and remember to use a thread lubricant. 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