PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF11MF-M5-0

The PF11MF series comprises spring-loaded, flare-mounted captive panel screws with a large knob, designed for mounting into thin panels where close centerline-to-edge applications are required. The screw installs flush on the back side of the panel without requiring high installation force and is compatible with any panel hardness. The M5 variant features a metric thread of M5 x 0.8, a minimum float of 0.25 mm in all directions, and is constructed with an aluminum knob and retainer, a hardened carbon steel screw, and a 300 series stainless steel spring. The standard finish is natural for the knob and retainer, with a zinc-plated screw per ASTM B633, SC1 (5 µm), Type III, colorless. A DuraBlack™ finish option is available. The minimum countersink angle is 90°, with a nominal countersink diameter of 6.76 mm and a sheet thickness range of 0.79 mm to 1.83 mm for optimal installation.