This flattened, mushroom-shaped knob evokes nostalgia for days gone by – a retro yet timeless look.

Includes a female 5/8″ x 11 threaded insert. Does not require the use of a separate adapter for use as an air brake knob. Compatible with most tractor / trailer air brake knobs. SOLD SINGLE.

This knob is not intended for use as a shifter knob. It has a different thread pattern from our shift knob bases.