PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M3-1-2

PF12MF captive panel screws are spring-loaded, flare-mounted fasteners with a large knob, designed for secure attachment and easy service access without loose components. The screw is made of hardened carbon steel with a zinc-plated finish per ASTM B633, SC1 (5µm), and features a 300 series stainless steel spring. The knob and retainer are aluminum with a natural finish. It is thread-forming for M3 x 0.5 metric threads, installs into a minimum sheet thickness of 1.05 mm, and requires a hole size of 4.75 mm. The threaded length is 1.83 mm, with a total installed height of 11.43 mm. The part provides a minimum float of 0.25 mm in all directions. Drive size is #1 Phillips. The finish options include a DuraBlack™ designation with suffix BL. Installation requires a countersunk hole as per page 28 specifications.