5/16" (8mm) Hole Size Stem Length: 18mm Flange Diameter: 18mm Black Nylon Phillips Screw Type Bumper Retainers Compare with: Auveco #19849, Ford # W706494-S300, W706494S300, Car Pak # 99-8140, 998140, W&E # 3112, Barnes / Kar # 99-8140, Crest / Midwest # CRX16078, Disco # 11338PK, 11338B, Kent / Lawson # P24236, Wurth # 150156117, Kimball / Midwest # 10229