#4 Machine Screw Washer Zinc 1/2-13 This step bolt is an

This step bolt is an ideal choice for projects requiring a strong and durable connection

which prevents it from loosening due to vibration or movement

they feature a #3 head and plain finish

1/2" External Tooth Lock Washer Zinc is a thin

The black zinc coating offers corrosion resistance

#4 Machine Screw Washer Zinc 1/2-13 This step bolt is an#4 Machine Screw Washer Zinc This #4 machine screw washer is made of zinc plated steel and is designed to be used with #4 machine screws. It has an outer diameter of 0. 375 inches and an inner diameter of 0. 138 inches. The washer is 0. 032 inches thick. It is used to distribute the load of the screw and to prevent the screw from damaging the surface of the material it is being screwed into.