... 6.8/8.8/10.9/12.9 Carbon Steel Hex Bolt 1.Material:Carbon Steel 2.Surface:ZINC,HDG,PLAIN 3.Certificate: ... 8.8/10.9/12.9 Carbon Steel Hex BoltWe are professional manufacturer of fasteners including hex bolt,hex nut,drop_in anchor,wedge anchor , washer ... )finish:zinc, black, plain,H.D.G7) material: Carbon Steel8)thread:BSW,BSF,UNC,UNF etc.9)certifications: ISO9001 ... /6.8/8.8/10.9/12.9 Carbon Steel Hex Bolt