Special Fasteners nuts bolts 1.ISO,ANSI,CE,DIN,BS& non-standard fastener supply ... Nuts Bolts Screw Fasteners. 1.What’s the specification of our Products ? MaterialCarbon steel,Stainless steel,Alloy steel,Copper,Aluminum are available.Carton steel is ... quality iron,such as 1022,1018,1010,1008,1015...Medium carbon steel are 35k,45#,10B21,1035,CH38F,1039,40ACR...Alloy ...