Notes: 121450-01570 STUD is original YANMAR product. 121450-01570 STUD5 is commonly used in transmissions/axles/engines 3TNE68-HIN, 3TNE78A-HP, 3TNE82A-DGD, 4TNE88-AD, 4TNE84-TW, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849