PennEngineering® Large Knob, Spring-loaded - PEM C.A.P.S. - Unified PF11PM-440-2-U

PF11PM series captive panel screws are spring-loaded, flare-mounted fasteners with a PC/ABS knob and hardened carbon steel screw and retainer, designed for use in sheet materials with a hardness of HRB 80 or less or HB 150 or less. The PF11PM-440-2-U variant features a #4-40 unified thread, 0.170 inch nominal length, and a blue-colored knob. The screw has a zinc-plated finish per ASTM B633, and the spring and retaining clip are 300 series stainless steel. The knob complies with UL 94V-0 and is halogen-free, with a maximum operating temperature of 210°F (99°C). The assembly includes a Phillips driver recess and permits a minimum float of 0.010 inch in all directions. The part is identified by a dot pattern on the knob and is intended for panel applications requiring tool access without loose hardware.