PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M4-0

The PF12MF series consists of spring-loaded, flare-mounted captive panel screws with a large knob, designed for secure fastening and easy service access without loose hardware. The screw is made of hardened carbon steel, the knob and retainer of aluminum, and the spring of 300 series stainless steel, with a zinc-plated finish per ASTM B633, SC1 (5µm), colorless. It installs into a minimum 0.79mm sheet thickness and has a countersunk head for flush mounting on the back side of the panel. The M4 metric thread has a nominal length of 7.37mm, a minimum float of 0.25mm in all directions, and is driven by a #2 Phillips driver. It is suitable for installation in painted panels, stainless steel, and thin circuit boards. The part includes a shoulder for positive stop during installation and is available with a natural or black anodized/knitride finish (BL suffix).