1/4” Stud Size 7/16” Hex Size 11/16” Flange Size Zinc Finish Thread Cutting Nuts Compare with: Auveco #3405, Car Pak # 74-4066, 744066, W&E # 2562, Barnes / Kar # C13431, MPC13431, Crest / Midwest # CRX1153, Disco # 9226PK, 9226B, Wurth # 150159244