The John Deere M159683 is a genuine OEM M12 hexagonal lock nut, engineered for reliable and secure fastening in a wide range of John Deere agricultural and turf applications. This high-quality nut features an M12 x 1.75 thread, an 18 mm hex size, and a height of 12 mm. Designed to resist loosening from vibration, it ensures the integrity of critical connections. It is a direct replacement part compatible with numerous John Deere models, including compact utility tractors like the 1025R, X700 series lawn and garden tractors, and ZTrak™ zero-turn mowers such as the Z950M. Trust genuine John Deere parts for optimal performance and durability.