PennEngineering® Captive Panel Screw-Tool only, Non Flush, Spring-loaded PFC4 - Unified PFC4-440-40-2

The PFC4™ captive panel screws are tool-only, captive fasteners designed for installation into stainless steel sheets with a hardness of HRB 88 / HB 183 or less, providing fixed screw solutions that meet UL 1950 and EC Machinery Directive requirements. They feature a spring-loaded shoulder and blue plastic retaining ring for positive stop during installation, with a concealed head design for flush mounting. The part is available in assorted screw lengths, including a .250 in (6.4 mm) length variant for #4-40 thread size, and installs in sheets as thin as .025 in (0.64 mm). The screw requires a #1 Phillips driver and has a recommended hole size of .25 in (6.35 mm) with a minimum edge distance of .25 in (6.35 mm). The numbering format includes a metric thread identifier on the head, and clinching profiles may vary. All dimensions are provided in both inches and millimeters.