Standard: DIN125 ,DIN433, DIN127, 9021 Material: GR2 GR5 GR7 GR9 GR12 Size:>M3-M30 Advantage:High tensile strength Description:1. Standard: DIN125 ,DIN433, DIN127, 9021 2. Material: GR2 GR5 GR7 GR9 GR123. Size:>M3-M304. Advantage: Light weight, resistance to acid and alkali, High tensile strength Material: GradeN ≤C ≤ H ≤Fe ≤O ≤ AlV PdGR10.030.100.0150.200.18 GR20.030.100.0150.300.25 GR40.050.100 ...