1. Material: carbon steel, stainless steel, brass, alum.
2. Diameter: #0~#17 or M2 ~M6.3.
3. Length: 1/4~8" or 6mm~200mm.
4. Standard: IFI, DIN, JIS, BS.
1. Head type: flat (C.S.K.) head, pan head, oval head, hex washer head, hex flange head, wafer head, flat washer head, pancake head, bugle head, pan framing head, trim head, flat head with undercut, fillister head, cheez head, mod. Truss head, truss (mushroom) head, etc.
2. Drive type: Phillips, star, pozi, square, slot, phillips/slot, phillips/square.
3. Thread type: type A, type B, type AB, type C, hi-low, double level thread, twinfast, coarse thread (60゚), deep thread(45゚), type 17, type23, type 25, type F, type U.