This is a A-199497C1 Drive Sprocket PN: 199497C1Main Description As Following : A-199497C1 Drive Sprocket P.N: 199497C1 (The nut contained in this kit only fits the shaft mfg by A&I, nut will not fit OEM shaft.)Dim A (1): 10 toothDim B (2): 1.00" bore w/ keywayIncludes: Sprocket, Nut, Washer Replaces: SP146 IH COMBINE , SP146H *** NO CLASS *** , Crossed From: AM199497C1 , , CS176278 SHOUP , WN-199497C1 , , WN199497C1 , , 110694 , , 864-SMA199497 , , 864SMA199497 , Found in Section & Models : Headers/Platforms/Feeder House > Corn Head Parts, Case-IH HEAD, CORN: 1043, Case-IH HEAD, CORN: 1044, Case-IH HEAD, CORN: 1054, Case-IH HEAD, CORN: 1063, Case-IH HEAD, CORN: 1064, Case-IH HEAD, CORN: 1083, Case-IH HEAD, CORN: 1084, Case-IH HEAD, CORN: 824, Case-IH HEAD, CORN: 833, Case-IH HEAD, CORN: 834, Case-IH HEAD, CORN: 844, Case-IH HEAD, CORN: 853, Case-IH HEAD, CORN: 854, Case-IH HEAD, CORN: 863, Case-IH HEAD, CORN: 864, Case-IH HEAD, CORN: 873, Case-IH HEAD, CORN: 874, Case-IH HEAD, CORN: 883, Case-IH HEAD, CORN: 900 SERIES, Case-IH HEAD, CORN: 943 Associated Items : A-126-124 Also This is An Aftermarket Product And : (The nut contained in this kit only fits the shaft mfg by A&I, nut will not fit OEM shaft.) Bore: 1.00" w/ keyway Includes: Sprocket, Nut, Washer Teeth: 10