Please note that any orders placed after 12pm CST on 12/23 may not ship out until Dec 26th when sales resume. Thank you.



3.5" BILLET ALUMINUM Oil Cap Fit Dexter 21-88 Trailer Axle bearing hub 10K 9-123 (21-88 Billet-KIT)

Pipeline Machine

Regular price $41.99

Billet Aluminum machined 3.5" Oil Bath Cap
Replaces Dexter 21-88 Oil caps
Part Number: 21-88 Billet-KIT 

The LAST OIL CAP you will ever buy!

Machined out of solid billet aluminum!
Practically Indestructible!

This fits the very common DEXTER 10,000# General Duty Axles made After July 2009.

The drum casting numbers will be 9-123 or 8-415 only.

If you have ever broken those clear plastic oil caps, this is your solution! they can not be broken,

And they look SHARP! (especially if you have aluminum wheels! Aluminum Fits Dexter 

To check the oil level, just stick your finger in the hole! 

Comes with new rubber O ring, and new rubber plug.

This kit contains:
1x 21-88 Billet Cap
1x 046-032-00
1x 010-163-00


This oil cap is a replacement for oil caps that are commonly found on 8-415 Oil Bath Drums Made After July 2009 and 8-430 hubs with 9-123 drums made After April 2009


Solid Billet Aluminum 
Fits Dexter Axles 
3.5" Thread OD 
12 Thread 
9k to 10k 

Features: 
- Fits Drum Number 8-415 (After July 2009)
- Fits Drum Number 8-430 (After April 2013)