These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. Tensile tested - lug studs undergo industry-standard proof-load testing to ensure strength Trustworthy quality - backed by team of professional engineers and quality control specialists in the United States Durable material - carbon steel meets SAE automotive industry standards for strength and hardness Corrosion resistant - extensive salt spray testing helps ensure years of durability against rust Package Dimensions: 4.81 x 3.63 x 2.19 inches Package Weight: 2.6 lb Package Quantity: 1 UPC: 019495103837 Bolt Grade: 8 Color: Silver Head Diameter: 0.920 in Material: Steel Package Contents: 1 Stud Quick-Start Nose: Yes SAE or Metric: SAE Shoulder Diameter: 0.616 IN Shoulder Length (In): 0.875 in Splined Bore Diameter: 0.652 IN Style: Serrated Stud Thread Diameter: 0.5625 IN Thread Direction: Clockwise (Right) Thread Length (In): 2.075 in Thread Size: 9/16-18 in Threads Per Inch: 18 Under Head Length: 3.150 in Country of Origin: US