stainless steel 201,304,316,B8,B8M hex nuts and heavy nuts! Our mostly products are stainless steel standard fasteners, you ... ), anchor bolts, U-bolts; Carriage bolts, hex bolts & hex nuts, heavy nuts, nylon lock nuts, flat washers, spring washers etc. Other ... used in construction, machine, chemical produce, traffic product, and environment engineering. stainless steel heavy nuts & hex nuts