Panel and Enclosure Hole Plugs: Type - Hole Plug; Mtg Hole Dia.- in - 1.250 in; Mtg Hole Dia.- mm - 31.8 mm; Max. Panel Thickness - 0.093" (2.3 mm); Plug Height - Length - 0.343" (8.7 mm); Plug Head Dia. - 1.437" (36.5 mm); Installation - Push-In; Material - Steel