... and services; Certification:ISO14001 ISO9001 SGS. Specifications Double threaded wood screw for bathroomProcess Capablilities Standard ISO, GB, DIN, JIS, ANSI, ... M0.8~M12Material Stainless, Steel,Brass, Steel,Bronze, Iron,Aluminum,Carbon steel,Alloy steel, silicon bronze,etc.Head/ ... screws, which are made of titanium, copper, aluminum, iron, stainless steel and so on. Through our modern manufacturing ...