Notes: 129150-01580 STUD, M8X30 is original YANMAR product. 129150-01580 STUD, M8X305 is commonly used in transmissions/axles/engines 4TNV84T-BMKTF, 4TNV84T-KAT, 4TNV84T-ZXKAT, 3TNV82A-BSTB1, 3TNV82A-BSTB, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849