Notes: 123911-13670 BOLT is original YANMAR product. 123911-13670 BOLT4 is commonly used in transmissions/axles/engines 4TNE106-TB, 4TNV106-NTB, 4TNV106-NTB, 4TNE106-TB, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849