PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M3-0

The PF12MF series consists of spring-loaded, flare-mounted captive panel screws with a large knob, designed for secure attachment and easy service access without loose hardware. The screw is made of hardened carbon steel with a zinc-plated finish per ASTM B633, SC1 (5µm), and the knob and retainer are aluminum with a natural finish. The spring is 300 series stainless steel. For M3 thread size, the minimum sheet thickness is 1.05 mm, the maximum head height is 10.59 mm, and the installed height above the panel is 7.87 mm. The part installs into a countersunk hole with a maximum diameter of 4.75 mm and provides a positive stop during installation. The knob features a knurled or smooth cap option, and the assembly allows a float of at least 0.25 mm in all directions from center. It is suitable for use on painted panels and stainless steel sheets.