... ) grade: 4.6.8.10.12 Bolts and nuts1) material: SS304.316.316L etc 2) types: hexagonal bolts and nuts, stud, screws etc 3 ... .6.8.10.12Bolts made of A2 or A4 material.Bolts and nuts (fastener) are made of carbon steel, alloy, stainless steel ... ) Made of 304,316,316L etc materials2) Available varieties: hexagonal bolts and screws, hexagonal nuts, flat washers, spring lock washers As a ...