Natural Nylon Finishing Washer - Bore Depth 4.2 mm | 0.165 in; Inside Diameter 4.3 mm | 0.169 in

Round Cup Washer used to insulate the head of a metal screw from electrical currents or other conductive materials. It is resistant to corrosion, oil and other chemicals. It can be used with most screw head styles. Made from natural Nylon.