We specialized in manufacturing hardware, such as standard and special self drilling screw, roofing screw, stamping nut, stamping spring, bolts , machining parts etc. And you can buy various of high quality of standard and non standard screws from global fasteners -kinsom in shanghai.China fasteners 8.Process : cold forging, die casting, metal injection molding 9.Applicaion: machine, electronics, tools, autos, fitness equipment and other industrial request Click us to get more information about this kind of product . 25kg/carton