304 High quality stainless steel. Stainless steel is a current material of a density of 7.93 g / cm3, also called 18/8. It has good maneuverability and high toughness up to a temperature of about 800 degrees Different screw sizes: M4 * 6, M4 * 10, M4 * 16, M4 * 20, M4 * 25 , M4 * 30, to meet the different needs. It is a very essential manual tool for the family with the nuts and washers DIN9021 * 50, DIN125 * 50, DIN127 * 50, DIN934 * 50, DIN985 * 50; The facilities are now more accurate with an increase in the contact surface, which reduces the pressure and protects the parts and screws the nuts and washers are arranged in a storage box, which allows you to easily find yourself in the series and avoid the loss when needed they are anti-oxidizable and corrosive even at high temperature. The main use of the stainless steel hex screw is very frequent in electronics, for electrical appliances, chemicals, water, machinery and equipment, furniture and many other domains Packet included: