PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF12MF-440-0

The PF12MF series consists of spring-loaded, flare-mounted captive panel screws with a large knob, designed for secure attachment and easy service access without loose hardware. The screw is made of hardened carbon steel with a zinc-plated finish per ASTM B633, SC1 (5µm), and the knob and retainer are aluminum with a natural finish. The part installs into panels with a minimum thickness of 0.000 in (0.000 mm) and features a 1/4-20 thread with a maximum installation hole size of 0.575 in (14.61 mm). The screw provides a positive stop during installation and allows for ±0.010 in (±0.25 mm) float in all directions. The driver recess is #3. The part is suitable for use in painted, stainless steel, and thin circuit board panels.