PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M4-1-2

The PF12MF series consists of spring-loaded, flare-mounted captive panel screws with a large knob, designed for easy service access without loose hardware. The screw is made of hardened carbon steel, the knob and retainer of aluminum, and the spring of 300 series stainless steel. It features a zinc-plated screw per ASTM B633, SC1 (5µm), Type III, colorless, and a natural finish on the knob and retainer. The part installs into a minimum 0.84mm sheet thickness with a countersunk hole size of 6.76mm max, and provides a float of 0.25mm minimum in all directions. The M4 x 0.7 thread complies with ASME B1.13M, 6g. The Phillips #2 driver size is specified for installation. Installation requires a shoulder stop for proper seating. The finish can be upgraded to DuraBlack with the BL suffix. The part is suited for use in painted or stainless steel panels and supports multiple panel thicknesses.