PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF12MF-440-1-BL-2

The PF12MF series consists of large knob, spring-loaded, flare-mounted captive panel screws with a hardened carbon steel screw, aluminum knob and retainer, and 300 series stainless steel spring. The part is finish-specified with a DuraBlack™ anodized knob and black nitride screw. It features a Phillips driver recess, a shoulder for positive installation stop, and a minimum 0.010 inch (0.25 mm) floating capability. Thread sizes include #4-40, #6-32, #8-32, #10-32, and 1/4-20, with installation data and performance metrics provided for these variants. The product is designed for applications requiring frequent service access and secure, loose-hardware-free panel mounting.