hex cap screw

material : carbon steel , stainless  steel , alloy steel .

class: class4 . class 8, class10.9,class12.9. grade2,grade5,grade8, A2-70, A4-80 A193 GR.B8, B8M

finish: plain, black oxide .blue zinc ,yellow zinc , black zinc , nickel and so on.

hex cap screw