Notes: 131837 STUD BOLT M12X1.5X38 35 Cr 4 CLASS 12.9 is original CARRARO product. 131837 STUD BOLT M12X1.5X38 35 Cr 4 CLASS 12.95 is commonly used in transmissions/axles/engines 138527, 138527, 138943, 138943, 147031, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849