This is a A-1975462C3 Brake Disc PN: 1975462C3Main Description As Following : A-1975462C3 Brake Disc P.N: 1975462C3 Inside Diameter: 1.838"Internal Splines: 10Outside Diameter: 6.000"Replaces: 404918R1 Replaces: 404918R91 IH , Crossed From: WN-1975462C3 , , WN1975462C3 , , 404918R1 CASE-IH Found in Section & Models : Transmission & Rear Axle > Brake Disc and Plates, Case-IH INDUSTRIAL/CONSTRUCTION: 2544 (Qty: 2), Case-IH TRACTOR: 544 (Qty: 2), Transmission & Rear Axle > Clutch Plates: Clutch and PTO, Case-IH INDUSTRIAL/CONSTRUCTION: 2544 (Qty: 2), Case-IH TRACTOR: 544 (Qty: 2) Associated Items : New Also A-IH-O-3121, A-IH-P-ENG-4DSL, A-IH-P-ENG14CYL, A-IH-S-544UTIL, A-IH-O-544, A-IH-P-ENG-4DSL, A-IH-P-ENG14CYL, A-IH-P-RMDSLPUMP, A-IH-P-544, A-IH-S-ELECDIA, A-IH-S-ENGD155, A-IH-S-ENG157, A-IH-S-HYDROTRN, A-IH-S-TOOLSLATE, A-IH-S-TUNEUP, A-IH-S-544, A-IH-S-544UTIL, A-SMIH202 And : Inside Diameter: 1.838" Internal Splines: 10 Outside Diameter: 6.000" Replaces: 404918R1