alloy wheel bolts M12 x 1.25, 17mm Hex, 26mm thread, taper seat Alfa Romeo x 20
•Thread size: M12 x 1.25. What is M12 x 1.25?. •Thread length: 26mm. •Spanner size: 17mm Hex. The Hex refers to the size of the nut/bolt head and therefore the corresponding size of the socket used with the wheel brace.