Spring screw fasteners Large Knob, Spring-Loaded  Types PF11, PF11M, PF11MF, PF11MW, PF12, PF12M, PF12MF, 

 type PF11 / PF12 family of panel fasteners provides design flexibility by offering three styles of installation types, each having the same profile or look above the sheet or panel into which it is installed. The various mounting types include self-clinching, flare-mounted, and floating styles. The standard selection of knobs include knurled or smooth metal caps and plastic