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HAULK DEPOT®

Bearing Kit – For 12K–15K HD Axles – Seal 10-3125-08 - BLK
SKU: 1215-BK-BLK
$65.70 USD $65.70 USD $73.00 USD
Sale 10.0% $7.30 USD (10.0%)
Shipping calculated at checkout.
In stock
Description

This heavy-duty bearing kit is made for 12,000–15,000 lb trailer axles and includes high-capacity tapered bearings (3984 and 28682) with a black unitized oil seal (10-3125-08). Ideal for oil-lubricated hubs, it provides reliable protection against leaks and contaminants in extreme-duty applications.

Detailed Information:
Axle Capacity 12,000 – 15,000 lbs (Heavy Duty)
Spindle Type Heavy-Duty Tapered (Oil Lubricated)
Inner Bearing 3984
Outer Bearing 28682
Seal BLK 10-3125-08
Brake Compatibility Typically 12.25" x 5" HD Drum Brakes
Fitting:

Fits most 12K–15K heavy-duty trailer axles with oil-bath hubs. Commonly used on commercial, agricultural, and industrial trailers equipped with tapered spindles.

Features:
  • Heavy-Duty Bearings: Engineered to handle intense weight and mileage.
  • BLK Oil Seal: High-durability seal resists oil leaks and contaminant ingress.
  • Extended Service Life: Reduces wear and improves longevity of hub components.
  • Complete Kit: Includes everything needed for one hub rebuild.
  • OEM Compatibility: Matches common specifications for HD axle assemblies.
Interchangeable Part Numbers:
  • 3984
  • 28682
  • 10-3125-08 (BLK Seal)
Product Overview:

Reliable and rugged, this bearing kit with black seal is built for 12K–15K HD axles. It offers a secure fit and long-term protection, ensuring safe operation in tough towing conditions.

We want you to be completely satisfied with your purchase. That’s why we offer a hassle-free return policy within 30 days of delivery*. If your item is unused, in original packaging, and eligible for return, you can send it back for a refund or exchange.

*Some exclusions may apply

Some of our products are backed by a 1-year limited manufacturer warranty covering defects in materials and workmanship under normal use. If you experience any issues during this period, we’ll work with you to repair, replace, or resolve it according to warranty terms.*

*Proof of purchase required

Need it fast? We’ve got you covered. Orders confirmed before 3 PM Eastern Standard Time (Monday–Friday) are processed and shipped out the same business day. Orders placed after the cutoff will ship the next business day.
Bearing Kit – For 12K–15K HD Axles – Seal 10-3125-08 - BLK

Customer Reviews

Based on 12 reviews
83%
(10)
17%
(2)
0%
(0)
0%
(0)
0%
(0)
I
Iago Stenners
Saved Me a Trip to the Parts Store

It's a complete kit, so I didn't have to hunt down each individual bearing and seal. A huge time-saver.

D
Dick Daintith
Easy to Install, Great Instructions

The kit was easy to install, and the included instructions were clear. The bearings seated perfectly. My trailer is back on the road.

S
Sanson Burtonwood
Good Kit for the Price

This is a solid, no-frills kit. The bearings are standard and the seal is a good quality. Can't complain for the price.

H
Haley Speer
Solid Kit, No Leaks

Replaced a leaking seal on my HD flatbed trailer. This black seal is holding up great, no more drips. The bearings feel solid.

O
Olenolin Scrymgeour
Top-Quality Components

The bearings were clean and well-greased, and the seal was robust. It's a noticeable improvement over the last kit I used.

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