This is a A-1317BH Spindle Axle Bolt 1"x7" 3/4" thread Rotary Cutter PN: 1317BHMain Description As Following : A-1317BH Spindle Axle Bolt 1"x7" 3/4" thread Rotary Cutter P.N: 1317BH Used in 80A311 Hub KitDim A (1): 1" BODYDim B (2): 3/4"-10 THREADDim C (3): 7" LENGTH Replaces: A-80A317 BUSH HOG , Crossed From: BH1317 , Found in Section & Models : Hay Tool Parts > Rotary Cutter Parts, Bush Hog ROTARY CUTTER: SEVERAL Associated Items : New Also This is An Aftermarket Product And : Used in 80A311 Hub Kit Dim A (1): 1" BODY Dim B (2): 3/4"-10 THREAD Dim C (3): 7" LENGTH