The McCormick 3546198M1 is a genuine OEM spark plug designed for reliable ignition in various agricultural machinery. Featuring an M14x1.25 thread, 19mm reach, and a 20.8mm hex size, this spark plug ensures optimal performance. It is compatible with a wide range of McCormick, Massey Ferguson, and Landini tractor models, providing a precise fit and consistent engine operation. Cross-referenced with popular aftermarket brands like NGK BPR6ES, Champion RN9YC, Bosch WR7DC, and Denso W20EPR-U, it offers a trusted replacement for maintaining engine efficiency.