weight:0.7kg size:20.6 x 13.6 x 4.6 cm Color: as shown With M2, M3 and M4 nuts and washers, installation is now more precise with an increased contact area that reduces pressure and protects parts and screws. The nuts and washers are arranged in a storage box, which makes it easy for you to find the series and avoid losing if necessary. They are antioxidant and corrosive even at high temperatures. The main application of stainless steel hex head bolts is widely used in electronics, electrical appliances, chemicals, water, machinery and equipment, furniture and many other fields.