The Massey Ferguson 1621684M1 is a genuine OEM oil pressure gauge designed for a wide range of Massey Ferguson tractors. This essential instrument features a 52mm diameter and a 1/8" NPTF thread, providing accurate oil pressure readings from 0 to 689.48 kPa (0-100 PSI). It ensures reliable monitoring of engine lubrication systems across numerous MF series, including 100, 200, 500, 600, 3000, 3100, 3600, 4200, 4300, 5300, 6100, 6200, 8100, and 8200 series.