Brand: McGard Manufacturer's Part Number: 63004 Part Type: Lug Nuts Product Line: McGard Drag Racing Lug Nuts Summit Racing Part Number: MCG-63004 UPC: 083509630046 Lug Nut Thread Size: 1/2 in.-20 Lug Nut Seat Style: Shank Lug Nut Head Style: Standard Locking: No Open End Design: Yes Lug Nut Overall Length (in.): 2.48 Lug Nut Shank Length (in.): 1.37 Lug Nut Shank Diameter (in.): 0.68 Washer Included: Yes Washer Shape: Centered round Washer Outside Diameter (in.): 1.22 in. Lug Nut Material: Steel Lug Nut Color: Chrome Wrench Size Required (in.): 13/16 in. Quantity: Sold as a set of 4. Notes: Washers are polished stainless steel. McGard Drag Racing Lug Nuts These McGard drag racing lug nuts are designed to be lightweight and strong and are proof-load tested to 160，000 psi. They are machined from special high-quality steel and then hardened and tempered for strength and durability. Their triple-nickel chrome plating is guaranteed for life not to chip， peel， or rust. For street use， the black nylon Allen plug can be left in place. For the strip or Pro Street cars， unscrew the plug to allow for the use of extra-long NHRA-approved studs.