Notes: 2112714 SELF-LOCKING SCREW ACCIAIO 12.9 UNI 3740 is original CATERPILLAR product. 2112714 SELF-LOCKING SCREW ACCIAIO 12.9 UNI 37401 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849