The McCormick 3691649M1 is a genuine OEM PTO shaft component, essential for power transmission within the PTO system of various agricultural machines. This shaft is specifically designed for McCormick CX series tractors, including models CX100, CX105, CX110, CX50, CX60, CX70, CX75, CX80, CX85, CX90, and CX95. It also fits a wide range of Massey Ferguson tractors, such as the 3000, 3100, 3600, 4200, 4300, 5400, 6100, 6200, 8100, and 8200 series. The shaft measures approximately 95 mm in length and 51 mm in height, with a weight of 0.12 kg. It is cross-referenced as Massey Ferguson 3691649M1, confirming its broad OEM compatibility.