This is a A-973625C2 Brake Disc PN: 973625C2Main Description As Following : A-973625C2 Brake Disc P.N: 973625C2 Inside Diameter: 2.105"Internal Splines: 16Outside Diameter: 7.875"Thickness: .304" Crossed From: 1702-2018 , Found in Section & Models : Transmission & Rear Axle > Brake Disc and Plates, Case-IH TRACTOR: 284 (gas eng. SN <-009036) (Qty: 2) Associated Items : New Also This is An Aftermarket Product And : Inside Diameter: 2.105" Internal Splines: 16 Outside Diameter: 7.875" Thickness: .304"