The McCormick 3687979M1 is a genuine OEM steering column designed for various McCormick tractor models, including the C Series (C100, C105, C110, C50, C60, C70, C80, C90), CX Series (CX100, CX105, CX110, CX50, CX60, CX70, CX75, CX80, CX85, CX90, CX95), MC Series (MC100, MC105, MC115, MC120, MC130, MC135, MC80, MC90, MC95), MTX Series (MTX110, MTX120, MTX125, MTX135, MTX140, MTX150, MTX155, MTX165, MTX175, MTX185, MTX200), T Series (T100, T110, T120, T70, T80, T90), and XTX Series (XTX145, XTX165, XTX185, XTX200, XTX215). This essential component ensures precise steering control and reliable operation for agricultural machinery.