PennEngineering® Large knob, spring-loaded Types PF11 and PF12 - Unified PF12-832-2-BL

The PF12 series comprises large knob, spring-loaded captive panel screws designed for secure attachment of thin metal panels with repeated access required. These fasteners install into punched holes and retain positive hold through spring-loaded action, with a shoulder on the retainer providing a positive stop during installation. The PF12-832-2-BL variant, where 832 indicates the M4 thread size, has a retainer pullout force of 3,000 lbs in aluminum and 4,500 lbs in cold-rolled steel, and a pushout force of 100 lbs in aluminum and 160 lbs in cold-rolled steel. The -2-BL suffix indicates a black finish, consistent with the series' availability in color-coded caps. Installation is tool-assisted and compatible with standard driver recesses for M4 threads.