This is a A-353427X1 Nut, 5/8" NF PN: 353427X1Main Description As Following : A-353427X1 Nut, 5/8" NF P.N: 353427X1 A-353427X1 Nut, 5/8" NF P.N: 353427X1 Stocked As: HD58NFNUT Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada