PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF12MF-832-0-2

The PF12MF series consists of spring-loaded, flare-mounted captive panel screws with a large knob, designed for secure panel attachment and 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, with a zinc-plated finish per ASTM B633, SC1 (5µm). It features a countersunk shoulder providing a positive stop during installation and allows for a minimum float of 0.25mm in all directions. The part is available in multiple thread sizes, including 8-32 (0.164-32), with a standard Phillips driver. The mounting configuration enables flush installation on the back side of the panel and is compatible with thin sheet materials of varying hardness.