Steering Shaft Nut for the following International and IH Farmall tractor models:
IH Farmall - [A, AV, B, BN (SN: 7014 and up)], A1, AI, BM, C, H, HV, I4, I6, ID6, M, MD, MDV, MTA, MV, O4, O6, ODS6, OS4, OS6, Super A, Super A-1, Super AV-1, Super C, Super H, Super HV, Super M, Super MD, Super MDV, Super MDV-TA, Super MTA (diesel), Super MTA, Super MV, Super MVTA, Super W4, Super W6TA, Super WD6, Super WD6TA, W4, W6, WD6, 100, 130, 140, 200, 230, 240, 300, 340, 350, 400, 404, 450, 504, 2404 [424, 444, 2424, 2444 (without power steering)].
Nut has good threads.
Case IH Steering Shaft Nut part numbers: 529683R1, 6660D, 6660DA.
The shaft nut is 2-3/16"-12 right hand thread.