Notes: 21234 HEX SOCKET HEAD CAP SCREW UNI 5931/M6X12 is original CARRARO product. 21234 HEX SOCKET HEAD CAP SCREW UNI 5931/M6X122 is commonly used in transmissions/axles/engines 210053, 210053, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849