Hex Bolt:
Raw material: Q195, 45#, 40Cr
Standard: DIN933/DIN931
Sizes: M2-M39
Length: 6mm to 300mm
Surface treatment: Biue\white\mixed\biue-white\blacken\zinc plated\hot dip galvanizing, etc.
Grade: 4.8\6.8\8.8\10.9\12.9