manufacturer part number: 720
Mount these cylindrical black rubber bumpers to the bottom of your project box to keep it from sliding across the table. Or, use them as endstops in a mechanical assembly. Or, clamp one between two nuts on a threaded motor shaft to serve as a traction wheel. The possibilities are endless. Outer diameter: 0.500 inch. Height: 0.250 inch. Use with a #4 button-head screw.