This is a A-30583100 Self Locking Nut (M10) PN: 30583100Main Description As Following : A-30583100 Self Locking Nut (M10) P.N: 30583100 Dim A (1): M12 Replaces: V30583100Z EDCOR , ZND2064VZ EDCOR , 071043 GEHL , Crossed From: F126287Z EDCOR , F86810Z EDCOR , G071043 EDCOR Found in Section & Models : Hay Tool Parts > Disc Mower Parts, Vicon MOWER, DISC: CM165, Vicon MOWER, DISC: CM165 (w/ 900.01734 Cutter Bar), Vicon MOWER, DISC: CM165 (Series 14020-14023-14034), Vicon MOWER, DISC: CM167, Vicon MOWER, DISC: CM216 (Series 14031), Vicon MOWER, DISC: CM217, Vicon MOWER, DISC: CM240 (Series 14022-14035), Vicon MOWER, DISC: CM247 Associated Items : New Also This is An Aftermarket Product And : Dim A (1): M12