Notes: 128170-13600 STUD, M8X31 is original YANMAR product. 128170-13600 STUD, M8X315 is commonly used in transmissions/axles/engines 4TNE84MT-EK, 4TNE84MT-EK, 4TNV84T-BGYM, 4TNV84T-BGYM, 4TNV84T-GKM, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849