PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M5-0

PF12MF captive panel screws are spring-loaded, flare-mounted fasteners with a large knob for easy access, designed for secure attachment of thin metal panels requiring repeated service. The assembly includes an aluminum knob and retainer, a hardened carbon steel screw with zinc plating per ASTM B633, and a 300 series stainless steel spring. The M5 thread size has a minimum sheet thickness of 1.83 mm and a maximum hole size of 6.76 mm, with a float of 0.25 mm minimum in all directions. The screw installs flush on the back side of the panel, and the shoulder provides a positive stop during installation. The driver size is #2. The part includes a knurled cap and natural finish unless designated with the "BL" suffix for DuraBlack finish.