1/2” (12.7mm) Hole Size Flange Diameter: 1” Shoulder Length: 7/64” Stem Length: 15/16” Black Nylon Plastic Cover On Engine Retainers Compare with: Auveco #15702, G.M. # 14101262, Car Pak # 87-6300, 876300, Crest / Midwest # CRX5102, Disco # 10714PK, 10714B, Kent / Lawson # KT11585, Winzer # 502.3237, Kimball / Midwest # 10766