Notes: 139149 RING NUT M50X1.5 H6 is original CARRARO product. 139149 RING NUT M50X1.5 H65 is commonly used in transmissions/axles/engines 140090, 140091, 143840, 143841, 370462, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849