1. Material: carbon steel, stainless steel.
2. Diameter: #6~#17 or M3.5~M6.3.
3. Length: 3/8~8" or 9.5mm~200mm.
4. Standard: IFI, DIN, JIS, BS.
1. Head type: hex washer head, hex flange head.
2. Thread type: type A, type BSD, type CSD, two level thread, w/wing.
3. Assembling: steel bonded washer, stainless steel bonded washer, PVC washer, stainless steel hex cap, umbrella type washer, nylon cap.