PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF12MF-0420-1-BL

PF12MF-0420-1-BL is a spring-loaded, flare-mounted captive panel screw with a knurled knob, designed for secure fastening and easy re-access in thin metal panels. The screw features a #1 Phillips driver, a 1/4-20 thread, and a DuraBlack™ finish on both the aluminum knob and the hardened carbon steel screw. The retainer and spring are made of aluminum and 300 series stainless steel, respectively, with the screw plated per ASTM B633, SC1. Installation requires a minimum panel thickness of 0.072 inch and installs into a 0.323 inch hole. The assembly provides a minimum 0.010 inch floating tolerance in all directions and includes a shoulder for positive installation stop.