SBD's HEYCO 17/32" (0.531 Inch) / 13.5 mm Hole ID Dome Locking Nylon PLUGS ' 1674 ' Head Dia 5/8" ' Overall Height 1/4" ' For Panel Thickness 0.016"-0.062"
SBDs (Pack of 25) 1-3/4" ID Hole Nylon Plastic Locking Plugs for Panels 1.75 Inch ID Round 1.916 " Head Diameter Max Metal Thickness 0.125" ' Body n Sheet Metal Hole Plugs