International / Farmall - Fits: Hydro 100, Hydro 70, 1026, 1066, 1256, 1456, 1466, 1468, 1566, 1568, 4166, 4366, 544, 656, 664, 666, 756, 766, 826, 856, 966;
Replaces: 403571R1, 403571R2
OEM switch 0.670" thread outside diameter
Note: Switch manufacturers consider OFF as one position.