... ISO14001:2004 ISO9001:2001 SGS Specifications Truss head hex socket machine screw Xiamen Haixingcheng Metal Products Co., Ltd. is a ... 9 etc.SizeM0.8~M12MaterialStainless, Steel,Brass, Steel,Bronze, Iron,Aluminum,Carbon steel,Alloy steel, silicon bronze,etc.Head/Tread ... Tin,Sn/Pb,Nickel,Chrome,Titanium, Cadmium, Dacromet,Heat dip zinc, Chromate , Electro Painting etc.Certificate SGS, ISO9001:2008, ...