1. Standard: Din, ansi, bs, gb. 2. Material: Carbon steel 3. Diameter: 3mm~45mm, 1/8~1-3/4inch 4. Thread: Mm, unc, unf, bsw 5. Grade: 4, 5, 6, 8 6. Finish: Plain, zinc, black, nickel, chrome, h. D. G. 7. Packing: Carton, box, bag, pallet