Notes: 26776-180002 NUT, LOCK M18 is original YANMAR product. 26776-180002 NUT, LOCK M185 is commonly used in transmissions/axles/engines 4TNV94L-XHYB, 4TNV94L-XHYB2, 4TNV94L-XHYB, 4TNV94L-XHYB2, 4TNV94L-PLK2, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849