Description:
Material: 45H Alloy steel
Hardness: HRC39-44
Size:M3，M4，M5，M6
Strength of extension: 1200MPa
Grade: 12.9 Class
Surface treatment: Quenching Treatment
Color: Black
Standard type，Cone Grub Screw.

Package Included and Size:
#1=75pcs M3×5mm      #2=75pcs M3×8mm
       75pcs M4×5mm             75pcs M4×8mm
       75pcs M5×5mm             75pcs M5×8mm
       75pcs M6×5mm              75pcs M6×8mm

More Details: