Rivets: Type - Fan Mount Rivet; Material - Rubber; Color - Black; Hole Size - nominal - 0.197" (5.0 mm); Fastening Thickness - Min. - 0.055" (1.4 mm); Fastening Thickness - Max. - 0.122" (3.1 mm); Installation - Tooless, Releasable; Length - 0.880" (22.2 mm); Head Height - 0.090" (2.4 mm); Head Diameter - 0.250" (6.2 mm); Material Specification - Type 6 nylon, RMS 180; Manufacturer Series - FM Series