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Knox Trailers · Air System
264A-4-4
In stock · ships from Knoxville
This is an air brake coupler, a brass compression fitting that joins two sections of 1/4-inch nylon air brake tubing in a straight line.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It is used on heavy-duty trucks and trailers to repair damaged air lines or extend circuits for brakes, suspension, and accessories. When an air line is cut, chafed, or requires rerouting, a coupler provides a secure, DOT-compliant connection that restores air-tight integrity. Replace the fitting if it becomes corroded, cracked, or causes persistent air leaks.
Part Number: 264A-4-4
AIR BRAKE COUPLER
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system
