PennEngineering® Large knob, spring-loaded Types PF11 and PF12 - Unified PF12-0420-2

The PF12 series comprises large knob, spring-loaded captive panel screws designed for secure attachment of thin metal panels with repeated access required. These fasteners install by self-clinching and feature a spring-loaded mechanism to prevent loose hardware. The series includes variants with knurled or smooth caps and is compatible with stainless steel panels. All variants share standardized thread sizes and installation profiles, with distinct head styles for tool or hand actuation. The PF12 designation confirms alignment with the PEM® captive panel screw family, bearing registered PEM® product markings.