1) Standards: DIN603, DIN604, DIN605, DIN607, DIN608, ISO8677, ANSI/ASME B18.5 (C-40) 2) Material of Carriage Bolt: Carbon steel 3) Finished: plain, black, zinc, H. D.G., nickel, phosphate 4) Diameter: M6-M20. 5) Packing: G. W.: 25Kgs/Carton or according to customers' favor 6) Delivery: By sea 7) Payment term: T/T or L/C At sight We also produce hex bolts, T-bolts, nuts, screws and many non-standard fasteners for customers to choose. If you are interested in any size of our products, please feel free to contact with me. Then I will give you more information of our products, and we can chat for more details.