4mm Stud Size 9mm Hex Size 15mm Flange Black Finish Thread Cutting Nuts Compare with: Auveco #12115, O.E.M. # N/A, Car Pak # 77-4492, 774492, 77-4657, 774657, Clip Lizard # 30115, Disco # 1040PK, 1040B, W&E # 5913, # 5913, Barnes / Kar # KP72961,