This is a genuine OEM SAME part number 21219067710, an M42x1.5x11 nut. It is designed for secure fastening in various SAME Explorer series agricultural tractors, including models such as Explorer 55, Explorer 60, Explorer 65, Explorer 70, Explorer 75, Explorer 80, Explorer 85, Explorer 90, Explorer 95, and Explorer 105. This essential component ensures reliable assembly and performance in compatible machinery.