PennEngineering® Large Knob, Spring-loaded - Types PF11M and PF12M - Unified PF12M-440-2-2

The PF12M series consists of large knob, spring-loaded, self-clinching captive panel screws designed for secure attachment of thin metal panels with subsequent access required. The screws feature a shoulder on the retainer that provides a positive stop during installation and are compatible with multiple panel thicknesses and materials, including stainless steel. They are available with knurled or un-knurled metal caps and black metal caps, and may include custom color options. The series supports mating with standard threaded holes and is suitable for applications requiring anti-corrosion performance and compliance with UL standards for painted panels. Installation is tool-assisted and hand-operable, with installation height standardized for M3 thread size.