High quality 304 stainless steel. Stainless steel is a common material with a density of 7.93 g/cm3, also called 18/8. It features good workability and high toughness up to a temperature of around 800 degrees. With M2, M3, M4 and M5 nuts and washers, installations are now easier. precision with an increased contact surface, which reduces pressure and protects parts and screws. Screws, nuts and washers are arranged in a storage box, which allows you to easily find you in the series and avoid loss when needed. They are anti-oxidant and corrosive even at high temperature.The main use of the hex steel screw Stainless steel is very common in electronics, electrical appliances, chemicals, water, machinery and equipment, furniture and many other areas. Products include:< /p> M28/12/16/20MM,30Pieces Each M38/12/16/20MM,20Pieces Each M48/12/ 16/20MM,15Pcs Each M58/12/16/20MM,10Pcs Each one Nut and washers M2 nut, 125pcs; M3 nut, 85pcs; M4 nut, 65pcs; M5 nut, 45 pieces; M2 stainless steel