wheel bolts nuts O.E. Flat seat, 17mm Hex, M12 x 1.5 33mm thread. x 16
•Thread size: M12 x 1.5. •Thread length: 33mm. What is M12 x 1.25?. •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.