This is a A-766379 Sprocket, Feeder Chain (RH/LH) PN: 766379Main Description As Following : A-766379 Sprocket, Feeder Chain (RH/LH) P.N: 766379 Dim A (1): 12 toothDim B (2): 1.750" Hex Bore Replaces: FM121 *** NO CLASS *** , FM121H *** NO CLASS *** , 618705 NEW HOLLAND , 687671 NEW HOLLAND , 80766379 NEW HOLLAND , Crossed From: AM766379 , , WN-766379 , , WN766379 , , 118772 , Found in Section & Models : Headers/Platforms/Feeder House > Grain Handling Shafts, Sprockets, Pulley, Ford / New Holland COMBINE: CR9040 (SN ), Ford / New Holland COMBINE: TR85 (SN 307999->), Ford / New Holland COMBINE: TR86, Ford / New Holland COMBINE: TR87, Ford / New Holland COMBINE: TR88, Ford / New Holland COMBINE: TR89, Ford / New Holland COMBINE: TR95, Ford / New Holland COMBINE: TR96, Ford / New Holland COMBINE: TR97, Ford / New Holland COMBINE: TR98, Ford / New Holland COMBINE: TR99 Associated Items : New Also A-FO-O-ENG363D, A-FO-S-254363D, A-NH-S-TR70COM, A-NH-S-TR7585, A-NH-S-TR70COM, A-NH-S-TR7585, A-NH-S-TR70COM, A-NH-S-TR95, A-NH-S-TR96 And : Bore: 1.750" Bore Type: Hex Teeth: 12