Notes: 21919 CHEESE-HEAD SCREW DIN 912-M24X40-8.8-A3 is original CARRARO product. 21919 CHEESE-HEAD SCREW DIN 912-M24X40-8.8-A34 is commonly used in transmissions/axles/engines 420130, 423290, 423290, 420130, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849