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

The PF12MF is a spring-loaded, flare-mounted captive panel screw with a knurled cap, designed for easy service access without loose hardware. It features an external thread in size #6-32 (0.138-32), a hardened carbon steel screw with zinc plating per ASTM B633, an aluminum knob and retainer, and a 300 series stainless steel spring. The screw installs into sheets as thin as 0.084 inch with a minimum 0.024 inch shoulder protrusion, and requires a #2 driver. The flare mount provides positive stop during installation with a float of 0.010 inch minimum in all directions from center. The knob has a natural finish; a black anodized option is available with the "BL" suffix.