1) Head type: Round head, Truss head, Flat head, Oval head, Pan head, etc. 2) Size: M3-M10 3) Material: Carbon steel 4) Grade: 4.8, 8.8, 10.9 5) Surface treatment: plain, black, zinc, H.D.G., nickel, phosphate 6) Inner Packing: In bulk or as customers' requests 7) Outer packing: Carton or as customers' requests 8) Payment: T/T or L/C at sight 9) Delivery: By sea We also produce bolts, nuts, thread rods, auto fasteners and many non-standard fasteners for customers to choose. If you are interested in any size of fasteners, please feel free to contact with me. Then I will give you more information of our products, and we can chat for more details.