This is a A-1981313C1 Plate, Driven PN: 1981313C1Main Description As Following : A-1981313C1 Plate, Driven P.N: 1981313C1 Diameter: 13.88"Spline Count: 30Spline Diameter: 2.061 Found in Section & Models : Clutch Parts > Dual Disc Clutch, Case-IH TRACTOR: 4894 Associated Items : New Also A-CA-P-4894, A-IH-S-AIRHEAT And : Diameter: 13.88" Spline Count: 30 Spline Diameter: 2.061