... , BS, GB, JIS, Non-standardMaterial: Carbon steel, stainless steel, alloys steel.Class: 4.8,8.8,10.9,12. ... etc. Professional production and processing: nut, nuts, pin shaft, stud bolt,screws, bolts, non-standard bolt, non ... the following 7 types:1. High strength alloy steel double end stud- , fully-threaded stud and ... .8, 10.9 and 12.9.5. Stainless steel internal and external hexagon bolt products: A2-70 ...