alloy wheel nuts bolts lugs. M12 x 1.5, 21mm Hex, Tapered Seat fits Kia x 4
•Thread size: M12 x 1.5. What is M12 x 1.5?. •Spanner size: 21mm 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. What is Hex?.