Materials: carbon steel, aluminum and stainless steelSurface treatment: ordinary or environmental zinc platingApplications: power distribution cabinets, wind machines, cars, railway, aviation, elevators, plastic products, air conditioners, electrical equipment, industrial electrical appliances, furniture and construction fieldsProduction processes: buy material, cold forging, heat treatment, tapping, electroplating and packingSizes: GB M3 to M12, UNC 8 to 32, 10 to 24, 1/4 to 20, 5/16 to 18, 3/8 to 16 and 1/2 to 13 inchesPacking: small plastic bags and carton