Positive locking in quick change applications where there is frequent insertion and removal of a fastener. They allow for consistent fastening force, eliminating the chance for under or over tightening by the operator. They are designed to be used with the cam receptacle referenced on the table. The fastener is mounted to the fixture and the receptacle is mounted to the base. The spring in the fastener allow for a range of fixture thicknesses. Turning the knob one quarter turn aligns and locks the fastener into place. The fasteners are marked with “ON” and “OFF” indicators to show the position of the fastening pins. They can be used with locating pins to provide highly accurate positioning. The body is made from 303 stainless steel with an electroless nickel plating finish. The pins are made from SUS440C stainless steel. The knob is made from black plastic. The shank is made from SKS3 steel with an electroless nickel plating finish, heat treated. The spring is made from 304 stainless steel. Three stainless steel socket head cap screws for mounting are included (M3X0.5 - 6 mm long). Receptacles are available (order separately).