PennEngineering® Large Knob, Spring-loaded - Types PF11MF and PF12MF - Metric PF12MF-M4-1-BL-2

PF12MF captive panel screws are spring-loaded, flare-mounted fasteners with a knurled knob, designed for easy service access and secure retention without loose hardware. The screw has a hardened carbon steel body with zinc plating per ASTM B633, SC1 (5µm), and a 300 series stainless steel spring. The aluminum knob features a black anodized finish as indicated by the 'BL' suffix. It installs into M4 x 0.7 threaded holes with a minimum sheet thickness of 1.83 mm and a maximum hole size of 6.76 mm. The design provides a float of at least 0.25 mm in all directions and installs flush on the back side of the panel. Driver size is #2.