Key Features: Wheel Studs 1/2-20x3.0. 685 Knurl 10pk. Wheel Stud - 1/2-20 in Thread - 3.000 in Long - 0.685 Knurl - Steel - Set of 10. Part Number: 8020. Back to top. State Restrictions. WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.