PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Unified PF11MF-032-0

PF11MF-032-0 is a spring-loaded, flare-mounted captive panel screw with a knurled metal cap and a #10-32 thread. It installs flush on the back side of thin panels, compensates for mounting hole misalignment, and features an anti-cross-threading design. The screw is made of hardened carbon steel with a zinc-plated finish per ASTM B633, the retainer and knob are aluminum, and the spring is 300 series stainless steel. The minimum floating capability is 0.25 mm in all directions. The required countersunk hole size is 0.266 in. (6.76 mm) in sheet thicknesses up to 0.072 in. (1.83 mm). The installed height above the panel is 0.514 in. (13.06 mm). The retainer pullout force is 180 lbs. (800 N) in cold-rolled steel. The part is installed using HAEGER H-117-8/10L punch and PEMSERTER 8013672 tooling with a 90° countersink and a nominal 0.38 mm flange width.