... : 1) Standard: DIN, ANSI/ASME, non-standard 2) Property grade: 8.8S, 10.9s 3) Surface: zinc plated, black oxide ... : 1) Standard: DIN, ANSI/ASME, non-standard 2) Property grade: 8.8S, 10.9s3) Surface: zinc plated, nickel plated, ... ) Widely used for steel structuresProduct information Description(TC bolt) Torshear type high strength bolts for steel structureMaterialAlloy steel ,carbon steel, stainless ...