PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF12MF-032-1-2

The PF12MF series consists of spring-loaded, flare-mounted captive panel screws with a large knob, designed for easy service access and secure fastening in thin panels. The screw is made of hardened carbon steel with a zinc-plated finish per ASTM B633, SC1 (5µm), and the spring is 300 series stainless steel. The knob and retainer are aluminum, with natural finish or optional black anodize. The part installs into a countersunk hole with a minimum sheet thickness of 0.072 inches and accommodates a thread size of #10-32 (032). It provides a minimum float of 0.010 inches in all directions and uses a #2 Phillips driver. The flare-mount design ensures positive stop during installation and allows for tool-free panel access without loose components. All variants in the series share these material, finish, and functional characteristics.