... : SS304.316.316L etc 2) types: hexagonal bolts and nuts, stud, screws etc 3) grade: 4.6.8 ... : SS304.316.316L etc 2) types: hexagonal bolts and nuts, stud, screws etc 3) grade: 4.6.8 ... .10.12Bolts made of A2 or A4 material.Bolts and nuts (fastener) are made of carbon steel, alloy, ... ,316L etc materials2) Available varieties: hexagonal bolts and screws, hexagonal nuts, flat washers, spring lock washers As a ...