RS PRO Black Acetal Thermoplastic Multiple Lobes Clamping Knob, Push-in

These screw knob caps can be assembled into complete threaded knobs by inserting a socket head cap screw (not supplied here) into the base of the cap.,Join by pressing squarely together. To avoid over-pressure, use a stop or spacer equivalent to length of screw less depth of screw head. All are 38mm dia, manufactured from Delrin Acetal resin and black in colour