Hole Size: 5/16" (8mm) Head Diameter: 16 mm Stem Length: 21 mm Black Nylon Rear Panel Push Retainer Compare with: Honda # 91561-S84-A00-M1, 91561-S84-A21ZB, Auveco # 20352, Crest # CRX17634, Clip Lizard # 10433, Disco # 15981 PK, 15981 B, Kimball / Midwest # 13343, Winzer # 501.1901, Wurth # 150155695