PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF12MF-832-1-2

PF12MF series captive panel screws are spring-loaded, flare-mounted fasteners with a knurled knob, designed for secure attachment and easy service access without loose components. The screw body is hardened carbon steel with zinc plating per ASTM B633, SC1 (5µm), and the knob and retainer are aluminum. It features a 0.25mm minimum float in all directions and installs into panels with a minimum thickness of 0.072 inch (1.83mm) for #8-32 thread size. The part includes a shoulder for positive installation stop and is compatible with a #2 driver. The finish is natural on the knob and retainer, with non-black options available. The thread is external, conforming to ASME B1.1, 2A.