This is a A-160974AS Trans Disc: 13", organic, spring loaded, (flat flywheel) PN: 160974ASMain Description As Following : A-160974AS Trans Disc: 13", organic, spring loaded, (flat flywheel) P.N: 160974AS Spline Count: 27Spline Diameter: 1.750" Replaces: 160974AS-RO WHITE TRACTOR , 3811 WHITE TRACTOR , Crossed From: SW02294 , Found in Section & Models : Clutch Parts > Single Clutch, White/ Oliver/ Mpl Moline TRACTOR: 175, White/ Oliver/ Mpl Moline TRACTOR: 1750 (S/N 180537- 190957), White/ Oliver/ Mpl Moline TRACTOR: 180, White/ Oliver/ Mpl Moline TRACTOR: 1800 (Optional), White/ Oliver/ Mpl Moline TRACTOR: 1850 (Diesel S/N <194007), White/ Oliver/ Mpl Moline TRACTOR: 1850 (Gas S/N <198393) Associated Items : New Also A-FRM-OLLATE, A-OL-O-1750, A-OL-P-1750, A-OL-S-1750, A-SMO202, A-FRM-IHOL, A-OL-P-18001900, A-OL-S-18001900, A-SMO202, A-FRM-OLLATE, A-OL-O-1850, A-OL-P-1850, A-OL-S-18501950, A-SMO202 And : Spline Count: 27 Spline Diameter: 1.750"