This is a A-A39212 Pressure Plate: 11", w/ hub, springs on side of levers PN: A39212Main Description As Following : A-A39212 Pressure Plate: 11", w/ hub, springs on side of levers P.N: A39212 Spline Count: 29Spline Diameter: 1.875" Replaces: A39212-R CASE Found in Section & Models : Clutch Parts > Single Clutch, Case-IH INDUSTRIAL/CONSTRUCTION: 480B, Case-IH INDUSTRIAL/CONSTRUCTION: 480C, Case-IH INDUSTRIAL/CONSTRUCTION: 580B, Case-IH INDUSTRIAL/CONSTRUCTION: 580C, Case-IH TRACTOR: 440, Case-IH TRACTOR: 480, Case-IH TRACTOR: 540 SERIES, Case-IH TRACTOR: 634, Case-IH TRACTOR: 640 Associated Items : New Also This is An Aftermarket Product And : Spline Count: 29 Spline Diameter: 1.875"