This is a A-RBX58 X Hub PN: RBX58Main Description As Following : A-RBX58 X Hub P.N: RBX58 Dim A (1): 2"Dim B (2): 2-1/2"Dim C (3): 7/16"Dim D (4): 1"Bore: 5/8" roundKeyway: 3/16" X 3-3/32" Replaces: PM20030010 SPROCKET/HUB/PULLEY/IDLER , 20030010 EDCOR , Crossed From: WSH30010 , , W20030010DS CASE-IH , 3016-0122 , , 6713-58413 JOHN DAY , 673-S80030500 , , 673S80030500 , Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Hubs, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 2" Dim B (2): 2-1/2" Dim C (3): 7/16" Dim D (4): 1" Bore: 5/8" round Keyway: 3/16" X 3-3/32"