This 1 - 5/8" tall high quailty air brake knob adapter is for all  5/8 x 11  thread air brake / trailer valves and will turn any 1/2 x 13 threaded size shift knob into an air brake / trailer knob. (Trucker knobs only)


* Comes with set screw 

Air Brake Adapter - Use with any 1/2 x 13 knob

Out of Stock