13/32" (10.3mm) Hole Size Stem Length: 1" Flange Diameter: 27/32" Black Nylon Phillips Screw Type Retainers Compare with: Auveco #14998, G.M. # 15672330, Car-Pak # 95-7376, 957376, Crest / Midwest # CRX9304, Disco # 11138PK, 11138B, Wurth # 150155024