PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF12MF-0420-0-2

PF12MF-0420-0-2 is a spring-loaded, flare-mounted captive panel screw with a 1/4-20 thread, designed for secure attachment and easy access in thin panels. The screw has a knurled knob, hardened carbon steel body, aluminum retainer and knob, and a 300 series stainless steel spring. It installs into a minimum panel thickness of 0.290 in (7.37 mm) and provides a minimum float of 0.010 in (0.25 mm) in all directions. The finish includes a zinc-plated screw per ASTM B633 and a natural finish on the knob and retainer. The part features a shoulder that provides a positive stop during installation, ensuring consistent mounting depth.