This is a A-3620409M91 PTO Disc: 9.843", organic, rigid PN: 3620409M91Main Description As Following : A-3620409M91 PTO Disc: 9.843", organic, rigid P.N: 3620409M91 Replaces: 887901M91Spline Count: 10Spline Diameter: 1.750" Replaces: 1867387M91 MASSEY FERGUSON , 325008146 LUK CLUTCH , 325008147 LUK CLUTCH , 8834 MASSEY FERGUSON , A-887900M1 MASSEY FERGUSON , 887901M91 MASSEY FERGUSON , Crossed From: M887901 , Found in Section & Models : Clutch Parts > Double Clutch, Massey Ferguson INDUSTRIAL/CONSTRUCTION: 500, Massey Ferguson TRACTOR: 133, Massey Ferguson TRACTOR: 135 UK (S/N 121070- 439190 w/ Diesel Engine), Massey Ferguson TRACTOR: 140, Massey Ferguson TRACTOR: 148 (S/N <605134), Massey Ferguson TRACTOR: 152, Massey Ferguson TRACTOR: 155, Massey Ferguson TRACTOR: 165 UK (S/N 564620> 10 Spline Captive), Massey Ferguson TRACTOR: 168, Massey Ferguson TRACTOR: 168 (S/N <255118), Massey Ferguson TRACTOR: 175 UK (S/N 729575>), Massey Ferguson TRACTOR: 177, Massey Ferguson TRACTOR: 178 (S/N 729575>), Massey Ferguson TRACTOR: 185, Massey Ferguson TRACTOR: 188 Associated Items : New Also A-MH-O-MF500B, A-MH-P-MF175178 And : Replaces: 887901M91 Spline Count: 10 Spline Diameter: 1.750"