PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF12MF-0420-1

The PF12MF-0420-1 is a spring-loaded, flare-mounted captive panel screw with a #1 Phillips driver, designed for secure attachment of thin panels with easy service access. It features a 1/4-20 thread, a minimum sheet thickness of 0.290 inch, and a total installed height of 0.790 inch. The knob and retainer are aluminum, the screw is hardened carbon steel, and the spring is 300 series stainless steel, with a zinc-plated screw finish per ASTM B633. The design includes a shoulder providing a positive stop during installation and allows a minimum float of 0.010 inch in all directions.