Wheel studs are an important part of any driveline, and ARP has long focused on manufacturing premium grade replacements for factory and aftermarket applications. In addition to press-in studs for most all domestic and sport compact vehicles, the company has screw-in studs for aftermarket axles. The most recent addition to the line, p/n 100-7738, has a 1/2-20 thread and an underhead length of 1.950 inches.
Like other ARP wheel studs, they are manufactured from 8740 chrome moly steel and heat-treated to a nominal tensile strength of 190,000 psi (some 26 percent stronger than Grade 8 hardware) and cadmium plated for extra durability. Threads are rolled (not cut) to provide up to 10-times better fatigue life.
Obtaining the optimum stud length is an important consideration, and ARP offers 1/2-20 screw-in studs up to 3.470-inch underhead length. Many racing associations require the stud to protrude from the lug nut a distance equal to its diameter.
ARP fasteners are proudly manufactured in-house at the firm’s California facilities. Details on the complete product line, as well as important tech info, are in the new 2023 catalog.
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