#10 x 3/8 x .032 Flat Washer Nylon is a type of flat washer that is used to distribute the load of a screw or bolt over a larger area. It is made of nylon, which is a strong and durable material that is resistant to corrosion and wear. This washer is 3/8 in diameter and has a thickness of .032. It is designed to be used with #10 screws or bolts.