This application is dimension of fastener. It has many types of bolt, nut, pin and washer in ASTM, BS, DIN, ISO and JIS standard. Bolts- Countersunk- Hex Head- Hex Head Flange- Button Head- Set Screw- Socket Head- Square HeadNuts- Cap Nut- Hex Nut- Hex Flange- Hex Slotted- Square Nut- Wing NutPins- Clevis Pin- Cylindrical- TaperWasher- Plain Washer- Spring Washer- Taper Washer- Square Washer