PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M3-2-2

The PF12MF series comprises spring-loaded, flare-mounted captive panel screws with a large knob, designed for secure fastening and easy reaccess without loose components. The screw is made of hardened carbon steel with a zinc-plated finish per ASTM B633, the knob and retainer are aluminum, and the spring is 300 series stainless steel. It installs into a minimum panel thickness of 1.05 mm and has a maximum installed height of 11.43 mm for M3 thread size. The part features a flared mounting design with a shoulder providing a positive stop during installation, and allows a minimum float of 0.25 mm in all directions. The standard driver recess is #1. The PF12MF-M3-2-2 part number is a variant of this series with a 2.13 mm retention length and a DuraBlack finish, as indicated by the trailing code -2; the series specification applies to all variants.