This is a A-70242572 Pressure Plate: 11", w/ 30 spline hub (w/ 1.437" flywheel step) PN: 70242572Main Description As Following : A-70242572 Pressure Plate: 11", w/ 30 spline hub (w/ 1.437" flywheel step) P.N: 70242572 Spline Count: 30Spline Diameter: 1.9875" Replaces: 70242572-R ALLIS CHALMERS , Crossed From: D242572 , , SW00229 , , 70242572K , , 70242572NC , , 70242572R , Found in Section & Models : Clutch Parts > Single Clutch, Allis-Chalmers TRACTOR: D17 (S/N 75001>), Allis-Chalmers TRACTOR: 170, Allis-Chalmers TRACTOR: 175 Associated Items : New Also A-AC-O-D17DERLY, A-AC-O-D17DSL, A-AC-O-D17GAS, A-AC-O-D17III, A-AC-O-D17IV, A-AC-O-D17MID, A-AC-O-IMPLHITCH, A-AC-O-MARKIVANDV, A-AC-P-D17, A-AC-P-D17SERIV, A-AC-S-D17, A-AC-S-FUELINJ, A-FRM-ACCACO, A-SMAC201, A-AC-O-170, A-AC-P-170175, A-AC-S-170175, A-FRM-ACCACO, A-SMAC201, A-AC-O-175GD And : Spline Count: 30 Spline Diameter: 1.9875"