• 21-40 – Screw-In Oil Cap - SKU 21-40
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Trailer Parts Mart

21-40 – Screw-In Oil Cap

21-40 – Screw-In Oil Cap

21-40

$25.95 USD
$0.00 USD $25.95 USD
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Check the match before you choose.Confirm the part number, dimensions and connection details against the part being replaced.

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Free shipping on orders $30+  ·  30-day easy returns  ·  Same-day dispatch before 7:30 PM

The 21-40 Screw-In Oil Cap is a high-quality, threaded cap designed specifically for Dexter 6,000 lb and 7,000 lb 5-spoke axles equipped with oil bath hubs.Crafted from durable clear Lexan plastic, this cap allows for easy visual inspection of oil levels without the need for removal, ensuring optimal maintenance and performance of your trailer’s axle system.

Key Features

  • Clear Lexan Construction:Provides visibility to monitor oil levels effortlessly.

  • Screw-In Design:Ensures a secure fit, preventing leaks and contamination.

  • Compatibility:Fits Dexter 6K–7K 5-spoke axles with oil bath hubs.

  • OEM Replacement:Replaces Dexter part number 21-40.

Specifications

  • Product Number:21-40

  • Outer Diameter:2.563 inches

  • Thread Size:2 5/8″-12

  • Material:Clear Lexan plastic

  • Includes:Oil cap only (O-ring and rubber plug sold separately)

Shipping information

Orders under $30 have a $15 shipping charge. Orders of $30 or more ship free.

Returns

Eligible items can be returned within 30 days. Review the return policy before sending an item back.

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