PennEngineering® Screw Head, Spring-loaded - Unified PFS2-440-40

PFS2-440-40 is a spring-loaded captive panel screw with a screw head, designed for tool or hand operation, retaining the assembly captive during mounting and removal. It features an external thread in #4-40 Unified Coarse pitch, with a shank length of 0.250 inches and a minimum sheet thickness of 0.060 inches. The retainer is made of hardened carbon steel with a bright nickel finish over copper flash per ASTM B689, Type II, and the screw is carbon steel with the same finish. The spring and retaining ring are stainless steel and nylon respectively, with a temperature limit of 200°F (93°C). The component installs in sheet hardness up to HRB 80 or HB 150, with a minimum hole size of 0.060 inches and minimum edge distance of 0.360 inches.