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4.0" BILLET ALUMINUM Oil Bath Cap 21-36 Trailer Axle bearing hub 10K-HD 12K-15K (21-36 Billet-KIT)

$72.96
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4.0" Billet Aluminum Oil Bath Cap 4"-12 Thread for 10K–15K Axles

Part Number: 21-36 Billet-KIT

Billet aluminum oil bath cap kit designed for heavy-duty trailer axles with 4"-12 threads, including O-ring and plug for secure sealing and reliable oil retention.

R&P Knowledge Hub

Oil bath caps maintain lubrication inside the hub. Correct sizing, thread engagement, and sealing components are critical for preventing leaks and protecting bearings under heavy loads.

Features

  • Billet aluminum construction for durability
  • 4"-12 thread oil bath cap design
  • Fits heavy-duty Dexter two-piece hubs
  • Includes O-ring and center plug

Specifications

Part Number 21-36 Billet-KIT
Thread Size 4" OD
Thread Count 12 Thread
Material Billet Aluminum
Axle Ratings 10K HD, 12K, 15K, Pre-09 10K GD
Compatibility Dexter 2-Piece Hubs

Included Components

Part Number Quantity Description
21-36 Billet 1 4" Billet Aluminum Oil Bath Cap (4"-12)
010-050-00 1 O-Ring (3.734" I.D., 0.139" Thickness)
046-032-00 1 Center Oil Plug
21-36 billet oil cap 4 inch 4-12 oil bath cap 10k 12k 15k axle hub cap Dexter oil cap replacement heavy duty oil bath cap kit trailer hub oil cap