PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF12MF-032-1

The PF12MF series consists of large knob, spring-loaded, flare-mounted captive panel screws designed for secure, tool-free access to panels requiring repeated removal. The screw is made of hardened carbon steel, with an aluminum knob and retainer, and a 300 series stainless steel spring. It features aPhillips driver recess, a shoulder for positive installation stop, and a minimum float of 0.25 mm in all directions. Thread size is #10-32, with nominal length of 0.350 in and minimum panel thickness of 0.072 in. The screw is zinc plated per ASTM B633, SC1, and available with a black anodized knob and black nitride screw finish upon special request. The part installs flush on the back side of the panel and is suitable for use with painted or stainless steel panels.