This application is dimension of fastener. It has many types of bolt, nut, pin and washer. Bolts. Countersunk. Hex Head. Hex Head Flange. Button Head. Set Screw. Socket Head. Square Head. Nuts. Cap Nut. Hex Nut. Hex Flange. Hex Slotted. Square Nut. Wing Nut. Pins. Clevis Pin. Cylindrical. Taper. Washer. Plain Washer. Spring Washer. Taper Washer. Square Washer.