Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Dixon · Air System
62NAB-4
In stock · ships from Knoxville
This brass union fitting joins a 1/4-inch nylon air brake line to a straight-thread port, commonly found in truck air brake systems and cab controls.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Equivalent to Dixon 62NAB4; fits any air system with 1/4" tubing and a matching 7/16"-24 straight thread port. Verify thread size and tubing type before installation.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
The ribbed sleeve compresses onto the tube for a secure, DOT-compliant seal, protecting against leaks that can cause brake pressure loss. It's typically replaced when fittings corrode, crack, or when air lines are upgraded.
Part Number: 62NAB-4
BRASS FITTING
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside air system