Allen Bolt 1, Material: steel 2,Grade:4.8 1, Name :Allen Bolt2, SizeM6*(8,10,12,16,20,25,30,35,40,45,50,55,60,65,70,80,90,100)M8*(12,16,18,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,100,110,120)M10(20,25,3,35,40,45,50,55,60,65,70,75,80,90,100,110,120,130,140,150,160)3,Grade: 4.8 ( Or: customized )4, Samples free5,High quality and reasonable price Hex agon Head Allen Bolt class 4.8 grade