iFJF 4Pcs 21-36 Oil Cap Kit for Dexter 9K/10K/12K/15K Axles – K71-148-00, 4.0-inch Thread
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Description
xOverview
The iFJF 4Pcs 21-36 Oil Cap Kit is a purpose-built replacement set designed for Dexter axles. This kit brings together four oil caps, four O-rings, and four rubber plugs—all packaged to refresh a dust-prone area that keeps your trailer system performing between maintenance checks. The parts are lightweight, corrosion-resistant, and built to endure regular use, offering a practical solution for roadside checks and routine service without guesswork.
What’s included
- 4 x 21-36 oil caps
- 4 x O-rings
- 4 x rubber plugs
Compatibility and specs
Compatible with Dexter 9K (AFTER 10-1-1989), 10K, 12K, and 15K axles. Note: it does not fit the 10K 2009 and newer "10,000# general duty axles from Dexter #21-88". Outside diameter is 4 inches; thread diameter is 4 inches with 12 threads per inch; depth is 1-1/2 inches. Replacement Part Number is K71-148-00, and the kit aligns with common Dexter part identifiers: oil caps 021-036-00, O-rings 010-050-00, plugs 046-032-00.
Materials and durability
Made from high-quality materials, the kit emphasizes lightweight construction while delivering corrosion and oxidation resistance. This combination supports reliable performance through seasonal storage and regular trailer use, helping keep the axle area protected from the elements.
How to use
- Inspect caps, O-rings, and plugs for wear before installation.
- Thread caps by hand until snug and verify a clean, dust-free seal.
Real-life scenarios
Ideal for campground trips, boat trailers, and utility trailers that sit between trips. The snug cap plus O-ring seal helps minimize dirt intrusion on dusty back roads and during wet road spray, supporting easier maintenance when you’re ready to service the axle assembly.
Maintenance and care
Regular inspection and proper storage extend the life of the cap kit. After cleaning or servicing, ensure surfaces are dry and free of grit before reassembly to preserve seal integrity.
Why choose iFJF
iFJF focuses on practical, ready-to-install parts that align with common Dexter axle configurations. The kit’s precise fit, clear packaging, and included components enable straightforward maintenance, helping you refresh a cap assembly with confidence rather than guesswork.
FAQ
Q: Which axles is this iFJF oil cap kit compatible with?
A: Fits Dexter 9K (AFTER 10-1-1989), 10K, 12K, and 15K axles; not for 10K 2009+ general duty axles.
Q: What comes in the kit and what should I check before ordering?
A: Includes 4 oil caps, 4 O-rings, 4 rubber plugs; Part K71-148-00; confirm 4.0-inch thread and axle model before purchase.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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