1/2 UNF Thread size. Shallow Slimline Spacer Wheel Nut. Available in M12 x 1.25, M12 x 1.5, M14 x 1.5 & 1/2 UNF. 1 x Shallow Slimline Wheel Nut. Not for use with Flat seat (eg standard Toyota/Mitsubishi wheels), Ball seat (eg standard Honda wheels), or standard Ford wheels.