PennEngineering® Large Knob, Spring-loaded - PEM C.A.P.S. - Metric PF11PM-M4-2-R

PF11PM captive panel screws are spring-loaded, plastic KAPS® fasteners with a Phillips drive, designed for use in sheet materials with a hardness of HRB 80 or less or HB 150 or less. The PF11PM-M4 variant has an M4 x 0.7 thread, a shank length of 8.89 mm, and installs into a minimum sheet thickness of 0.92 mm with a maximum of 3.05 mm. It features a flare-mounted retainer, a colored knob (red, as indicated by the -R suffix), and a retainer with a clinching profile that provides a positive installation stop. The knob is made of PC/ABS (UL 94V-0, halogen-free), the screw and retainer of hardened carbon steel, and the spring and clip of 300 series stainless steel. The screw is zinc-plated per ASTM B633, SC1. Maximum installed height above the sheet is 13.06 mm. Available mounting hole diameters and edge distances are specified for reliable installation.