5/16 Machine Screw Washer Zinc 10-24-2B It is a flat washer

It is a flat washer with a 1/2" outside diameter and a 5/16" inside diameter

They are easy to install and remove

reducing the need for pre-drilling and saving you time

Its square shape provides increased surface area for a stronger hold

It has a square shape and is slotted for easy installation

5/16 Machine Screw Washer Zinc 10-24-2B It is a flat washerThis 5 16" Machine Screw Washer is made of zinc plated steel and is designed to be used with 5 16" machine screws. It is a flat washer with a 1 2" outside diameter and a 5 16" inside diameter. The washer helps to distribute the load of the screw and prevent it from damaging the surface of the material being fastened. It is also used to prevent the screw from loosening due to vibration or movement. This washer is zinc plated for corrosion resistance