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

The PF11MF series consists of large knob, spring-loaded, flare-mounted captive panel screws designed for secure fastening and repeated access without loose hardware. These fasteners install into sheet materials such as aluminum and cold-rolled steel, with a minimum thread size of M3. Performance data indicates a retainer pullout force of 250 lbs for M3 and up to 400 lbs for M6, depending on size. The screw features a flare-mount design that accommodates mating threads and provides a flush installation on the back side of the panel. All variants in the series are compatible with painted and stainless steel panels, and are available in black colors. The part number PF11MF-832-1-2 is not explicitly listed, but the PF11MF series is fully described with consistent specifications across its variants.