PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF11MF-632-2

The PF11MF-632-2 is a spring-loaded, flare-mounted captive panel screw with a #6-32 thread, designed for installations requiring flush mounting on the back side of a panel. It features a knurled metal cap, a hardened carbon steel screw, an aluminum retainer, and a 300 series stainless steel spring. The assembly allows for a minimum float of 0.010 inch (0.25 mm) in all directions and accommodates panel thicknesses up to 0.084 inch. Installation requires a countersunk hole and uses specific tooling to flare the retainer. The screw is zinc-plated per ASTM B633, SC1 (5 µm), and the DuraBlack™ finish is an optional coating. It meets ASME B1.1 and B1.13M thread standards.