... , A4), 304L, 316L, B8, B8M etc. Our mostly products are stainless steel standard fasteners, you can choose mainly materials between 200 ... lock nuts, flat washers, spring washers etc. Other products include stainless steel round bars, angle iron, channel bars, wire rods, stamping ... construction, machine, chemical produce, traffic product, and environment engineering. SS304 stainless threaded rod