Notes: 2887246 STUD R22X2.5 - D20X1.5 - L80 10.9 is original CATERPILLAR product. 2887246 STUD R22X2.5 - D20X1.5 - L80 10.91 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849