Recommended Dexter Fortress Threaded Aluminum Oil Cap to Replace a Dexter 021-036-00 Cap
Updated 11/03/2025 | Published 01/15/2025
Question:
I’m wanting to upgrade my clear plastic oil caps dexter part number 021–036–00 to these aluminum caps. Will these fit? It’s going on a 2003 model big Tex trailer with Dexter 10,000 pound axles.
asked by: Clint S
0
Expert Reply:
Yes, they will! The Dexter Fortress Threaded Aluminum Oil Cap item # DX39CR is a replacement for Dexter's 021-036-00 cap. It fits 4" threaded hubs and is easy to access to fill or drain your axle's oil.
expert reply by:
Jerred H
0
Product Page this Question was Asked From
Dexter Fortress Threaded Aluminum Oil Cap for 10K to 16K Axles
- Trailer Bearings Races Seals Caps
- Caps
- Oil Cap
- 4.00 Inch O.D.
- 4.00 Inch
- 10000 lbs Axle
- 12000 lbs Axle
- 15000 lbs Axle
- 16000 lbs Axle
- Dexter
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on Trailer Bearings Races Seals Caps
on Trailer Bearings Races Seals Caps
Jerred H.
11/3/2025
Hey, how did the switch to the aluminum oil caps go on your Big Tex trailer? Your update could make it easier for the next person upgrading from the clear plastic caps.