The McCormick 3690741M3 is a genuine Power Take-Off (PTO) shaft designed for reliable power transmission in a wide range of agricultural machinery. This OEM component ensures optimal performance and durability, fitting numerous McCormick MC, MTX, and XTX series tractors, as well as various Massey Ferguson models including the 300, 4200, 4300, 5400, 6100, 6200, 6400, 7400, 8100, and 8200 series. It also fits select Fendt Vario, Valtra A, N, T Series, and Challenger MT series tractors. This shaft replaces earlier part numbers 3690741M1 and 3690741M2 and is superseded by 3690741M4.