The McCormick 3686104X1 is a genuine OEM hexagon head screw, precisely engineered for secure fastening in McCormick agricultural machinery. This robust screw, with a 12mm diameter and 70mm length, is a critical component for maintaining the structural integrity of various McCormick MC and MTX series tractors, including models such as MC100, MC115, MTX120, MTX135, and MTX150. Its durable construction ensures reliable performance in demanding operational environments.