PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF11MF-M3-1

PF11MF-M3-1 is a flare-mounted, spring-loaded captive panel screw with a metric M3 thread, designed for installation into thin panels where flush mounting and alignment compensation are required. It features a knurled aluminum knob, hardened carbon steel screw, and 300 series stainless steel spring, with a zinc-plated screw finish per ASTM B633. The retainer shoulder ensures positive stop during installation, and the design allows for a minimum float of 0.25 mm in all directions. It installs into panels of any hardness using a countersunk hole and requires specific tooling with anvil and punch dimensions of 6.6 mm and 11.1 mm respectively. The screw has a threaded length of 0.79 mm and a maximum sheet thickness of 1.05 mm for installation.