Notes: 6190302M1 STUD 10.9 UNI EN ISO 898-1 B6 - CARRARO is original MECALAC product. 6190302M1 STUD 10.9 UNI EN ISO 898-1 B6 - CARRARO1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849