Black UL94 V-2 Nylon Flat Mini Tough Push-In Rivet - Compatible Hole Diameter Range 3.1 - 3.3 mm (0.122 - 0.128 in) Compatible Panel Thickness Range 3.9 - 4.6 mm (0.155 - 0.180 in) Anchor Length 9.6 mm (0.377 in)