This is a A-30561200 NUT (M12) PN: 30561200Main Description As Following : A-30561200 NUT (M12) P.N: 30561200 Dim A (1): M12Dim B (2): DIN 934 Stocked As: A-M12NUT Found in Section & Models : Hay Tool Parts > Disc Mower Parts, 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 Dim B (2): DIN 934