The McCormick K617157 is a genuine OEM M16x1.5 nut designed for secure fastening in agricultural machinery. This essential component ensures reliable performance across a wide range of McCormick CX, CMAX, MC, MTX, X4, X5, X6, X7, X8, and XTX series tractors. It also serves as an equivalent to Massey Ferguson part numbers 3326120M1 through 3326120M6, fitting numerous MF 100, 200, 500, 600, 3000, 3600, 4200, 4300, 5400, 6100, 6200, 6400, 7400, 8100, and 8200 series models.