... M3-M56 4) Grade:4, 6, 8, 10,2. Hex nut : 1) material: steel , carbon steel, Brass , Ss, ... 8.1, 10, 5) Model: DIN934,3. High intensity nut& bolt:1) material: 40Cr,42CrMn 45# etc2) Surface : ... 12.95) model:DIN98 ,DIN987,GB889.16) QC: SGS5. Wing nut & bolt: 1) material: alloy stainless steel , brass,Sus304, ... : fish bolt with square nut, wheel nuts & bolts, T-nuts lock nut, flange nut ,domed cap nuts and ...