Notes: 20E-14-K1280 HEXAGON NUT UNI 5589 M10 8 is original KOMATSU product. 20E-14-K1280 HEXAGON NUT UNI 5589 M10 81 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849