Essentra SR-4060W White UL94 V-2 Nylon Round Snap Push-In Rivet - Compatible Hole Diameter Range 4.1 - 4.2 mm (0.161 - 0.165 in) Compatible Panel Thickness Range 3.5 - 4.5 mm (0.138 - 0.177 in) Anchor Length 6 mm (0.236 in)