12 - 1.75mm Bolt Size 21mm Flange O.D. Black Finish Push On Type Retainers Compare with: Auveco #12127, O.E.M. # N/A, Car Pak # 77-4490, 774490, W&E # 5919, Barnes / Kar # KP72541, 43545, Kent / Lawson # KT11458, Wurth # 150159353, Disco # 1044PK, 1044B