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

PF12MF captive panel screws are spring-loaded, flare-mounted fasteners with a large knurled knob, designed for secure attachment and easy service access. The assembly consists of an aluminum knob and retainer, a hardened carbon steel screw, and a 300 series stainless steel spring. The external thread conforms to ASME B1.1, 2A for unified sizes, with the 8-32 variant capable of installing into sheet materials up to 0.350 inch thick. The screw length is 0.350 inch, and the minimum countersunk hole size is 0.266 inch. The finish option BL includes a black anodized knob and black nitrided screw. A shoulder provides a positive stop during installation, and the retainer floats up to 0.010 inch in all directions.