PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M4-1-BL

PF12MF-M4-1-BL is a spring-loaded, flare-mounted captive panel screw with a black DuraBlack finish, designed for secure, tool-accessible fastening in thin panels requiring repeated service. It features a calibrated shoulder for positive installation stop, a flared retainer, and a knurled aluminum knob with a #2 Phillips driver recess. The screw has an M4 x 0.7 metric thread and installs into a minimum sheet thickness of 1.83 mm with a required hole diameter of 6.76 mm. The spring and retainer are aluminum, the screw body is hardened carbon steel, and the spring is 300 series stainless steel. The assembly permits a minimum float of 0.25 mm in all directions. The part is identified by PEM™ markings consistent with genuine PEM™ captive hardware.