5/16" (8mm) Hole Size Stem Length: 18mm Flange Diameter: 18mm Black Nylon Phillips Screw Retainers Compare with: Ford # W706713-S300, W706713S300, Disco # 15009PK, 15009B, Auveco # 20367, Car-Pak # 99-8146, 998146, Crest / Midwest # CRX17712, Kent / Lawson # KT12853, Winzer # 502.4029, Kimball / Midwest # 10217