1/2-20 x 2-3/8 Inch Press In Knurled Wheel StudA wheel lug stud is a threaded fastener that provides a mounting point for the wheel. The lug nut fastens to the lug stud to secure the wheel to the hub. Over time, a wheel stud may develop fatigue from pulling heavy loads. If you regularly use your vehicle to haul heavy items, one or more lug nuts or studs will eventually fail because of the forces exerted on them. You should replace your lug stud if it has broken off or if the threads have been