... steel2.stanard:DIN975 3.size:from m3--m56 4.length:from1m to 4m5.grade: 4.8,5.8,8.8,10.9 ... : Carbon Steel, Stainless Steel..Standard: DIN975, ANSI ,BSW, GB. Gr 4.8-8.8.B7..Specifications: M3-M56,3/16-1 ... "-1/2.1M-4M..grade: 4.8,5.8,8.8,10.9,12.9 .Surface ...