1. Material: carbon steel, stainless steel, brass, alloy.
2. Diameter: #2~5/16 OR M2~M8.
3. Length: 1/8~3" OR 4mm~80mm.
4. Standard: IFI, DIN, JIS, BS.
1. Head type: pan head, hex head, hex washer head, filister head, etc.
2. Drive type: Phillips, star, pozi, square, slot, phillips/slot, phillips/square, hex socket(allen key).
3. Thread type: machine screw, trilobular thread screw, self drilling screw, etc.
4. Washer type: helical split washer, external tooth washer, internal tooth washer, flat washer, square cone washer, etc.