Special Fasteners nuts bolts 1.ISO,ANSI,CE,DIN,BS& ... Fasteners,Special Nuts Bolts Screw Fasteners. 1.What’s the specification of our Products ? MaterialCarbon steel,Stainless steel,Alloy steel,Copper, ... such as 1022,1018,1010,1008,1015...Medium carbon steel are 35k,45#,10B21,1035,CH38F,1039,40ACR...Alloy ... more than 20 years experiences in screw,bolt,nut,washer,rivet, stud, pin,wrench and so on .2.Our ...