PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M3-0-2

The PF12MF series consists of large knob, spring-loaded, flare-mounted captive panel screws with external threads per ASME B1.1, 2A, designed for installation into thin sheets and panel materials requiring repeated access. The assembly includes an aluminum knob and retainer, a hardened carbon steel screw, and a 300 series stainless steel spring, with a zinc-plated screw finish per ASTM B633, SC1 (5µm). It features a shoulder for positiveInstallation stop and supports M3 x 0.5 thread size with a minimum thread length of 1.05 mm and a maximum head diameter of 4.75 mm for a sheet thickness up to 0.79 mm. The screw head accepts a #1 Phillips driver, and the assembly allows a minimum float of 0.25 mm in all directions. All components are available with a natural or optional black anodized or DuraBlack finish.