Dorman 610-0499.5 5/8-11 and 5/8-18 Double Ended Stud These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. Corrosion tested - 72-hour salt spray testing simulates three years of corrosion resistance Tensile tested - lug studs undergo industry-standard proof-load testing to ensure strength Vehicle model years this part fits:Chevrolet P30 Van: 1974Chevrolet P30: 1975, 1976GMC P35/P3500 Van: 1974GMC P35: 1975, 1976 Trustworthy quality - backed by team of professional engineers and quality control specialists in the United States Save on Dorman Wheel Stud: Serrated, 5/8-18 Thread Size, Right Hand Thread (sold by each) 610-049 at Advance Auto Parts. Buy online, pick up in-store in 30 minutes Aazon.co: Doran 610-301 Rear 9/16-18 Serrated Wheel Stud - 0.622 in... Dorman 610-049 Wheel Studs - 5/8-18 Serrated .680 Knurl 3" Length 10-Pack For Chevy/GMC Vans