4mm Stud Size 11mm Flange O.D. Black Finish Push On Type Retainers Compare with: Auveco #12119, G.M. # 11501937, Car Pak # 77-4486, 774486, Barnes / Kar / MCS # KP72536, Disco # 1691PK, 1691B, Lawson / Kent # 83967, S&R # 255050