A lug nut helps hold the tire on the wheel hub. The wheel bearing, a critical component, lives inside the hub. Externally, wheel studs stick out from the hub like metal fingers. You hang the wheel and ...
They tell us that the part was probably used to attach wheel pants once upon a time. There may have been a lug nut on the other wheel that was taken off, or fell off. Wheel pants are not required ...
The first number, 5 or 6 in our examples, indicates the number of holes in each wheel's bolt pattern -- the lug nuts you see.