PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M4-0-2

The PF12MF series comprises large knob, spring-loaded, flare-mounted captive panel screws with an external metric thread, designed for secure attachment and repeated access without loose hardware. The screw body is hardened carbon steel with zinc plating per ASTM B633, the knob and retainer are aluminum, and the spring is 300 series stainless steel. The part installs into a minimum sheet thickness of 1.83 mm with a maximum hole size of 6.76 mm and provides a minimum 0.5 mm float in all directions. The knurled cap has a Phillips driver recess and a shoulder for positive installation stop.