The McCormick 4218334M1 Spark Plug is a genuine OEM component designed for optimal performance and reliable ignition in a wide range of McCormick agricultural machinery. This spark plug features an overall length of 70 mm, a thread length of 19 mm, a thread diameter of 14 mm, and a hex size of 20.8 mm. It is a critical component for maintaining engine efficiency and is compatible with various McCormick C, CX, MC, MTX, X4, X5, X6, X7, X8, and ZTX series tractors. This part is also cross-referenced with equivalent OEM and aftermarket numbers from brands like Case IH, Landini, Massey Ferguson, Valtra, Perkins, JCB, New Holland, Claas, AGCO, Lucas, NGK, and Bosch, highlighting its broad applicability and quality.