McGard Lug Nuts

McGard 64010 1/2-20 3/4" Hex Lug Nut


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The lug nuts bear a side comment.  While the factory lug nuts have the more appealing finish of the stainless-steel cladding on the nut, they have a tendency to come apart at the most inopportune times.  When they do, the nut underneath is a different size from the lug wrench.  If the cladding happens to get lost, you will find getting the lug nut off requires using a socket of the correct size - something you might not have with you on the trail.

McGard 64010 1/2-20 3/4" Hex Lug Nut

After having this problem a couple times, I purchased some lug nuts at Wal*Mart and replaced my factory nuts.  I figured the solid nut would be better and I would not have any more problems with lug nuts...  All was well until I was on the trail and blew out a sidewall.  You guessed it - the factory lug wrench is a different size...  Fortunately, I had brought along my tools and I barely missed a beat.  But it got my attention because I don't always carry my tools.

When I was swapping tops and doing all the touch-up work, I took a look at the lugs.  They were trashed.  Every time I had new tires put on and every time I rotated them, an impact wrench was used.  I like them for the speed and ease, but they destroy things like lug nuts. 

Example of various brands of lug nuts...Do you see your's?

So next time I go to the tire store I expect not to be very popular because the impact wrench will not touch my wheels again.  As a matter of fact, I will probably just bring the wheels.  That way there's nothing to discuss.  No lugs, no wrench. Period.

Made in U.S.A.              Lifetime No Rust Guarantee

I bought the McGard lugs because the wheel and tire shop I worked in used them with good results.  I know there are probably better ones out there but these should be fine, nearly double the cost of the Wal*Mart ones, but perhaps a lot better, and best of all, they're the same size as the factory ones (3/4" hex nut, 1/2-20 thread).

As before, I purchased six packages (24 lug nuts) to provide two spares that I attach to the spare tire so that they are handy, and so that the spare has a finished appearance.  The part number is 64010 which gets you the 1/2-20 bulge nuts with a 3/4" hex head.  Note this matches the factory lug nuts and will allow the use of the factory lug wrench.

Lug Nuts, bolts and lock washers

McGard lug nuts are guaranteed for life.
McGard lug nuts are designed to last for life. They're triple nickel chrome plated for lasting beauty, and are made of restricted chemistry steel for structural integrity. All McGard lug nuts are through-hardened and tempered, reaching the depth of hardness needed for their unsurpassed level of safety (unlike case-hardening, which is only a surface treatment). McGard lug nuts also offer a lifetime guarantee against rust! What more could you ask for?

Bulge lug nuts have an extended seating surface that is designed to match the wider seating surface used on some aluminum wheels.

McGard employs the same innovative design and high quality standards used in the production of their wheel locks in the manufacture of chrome plated lug nuts. The in-house plating technology and experienced personnel are second to none in the industry. These capabilities enable McGard to produce superior quality lug nuts that are strong, safe, durable and exceed typical corrosion resistance standards. They're so durable in fact that they are guaranteed for life not to rust, chip, or peel!

McGard is the only manufacturer to offer 8 different key hex sizes to match the vehicle's original equipment lug wrench. The user will appreciate this important feature when they have to change a flat along the roadside.

The McGard process includes three layers of nickel and one layer of microporous chrome. The first layer of nickel is for corrosion resistance; the second layer of nickel is for luster and the third nickel layer interacts with the microporous chrome layer to disperse nature's corrosive action (rust)

McGard usees only restricted chemistry steel, made in the United States specifically for McGard. These special standards insure the structural integrity of each and every full machined McGard piece. Every lug nut is through-hardened and tempered, reaching the depth of hardness needed for its unsurpassed level of safety (unlike case hardening which is only a surface treatment).

Core integrity and precision machining provide the highest strength in the industry. All McGard locks and lug nuts meet or exceed the highest OEM proof load standards, 135,000 to 160,000 PSI.

McGard's standard for concentricity of the bearing surface to the pitch diameter is 30% more precise than OEM standards. This insures even distribution of the clamp load and uniform seating of the lock to the wheel.


Brand New Lug Nuts
A B McGard McGard C D
Approx. 1 year of exposure, 22 hours
A B McGard McGard C D
Approx. 3 years of exposure, 66 hours
A B McGard McGard C D
Approx. 5 years of exposure, 110 hours
A B McGard McGard C D
As you can see by these unretouched photos, McGard lug nuts look great even after 1, 3 and 5 years of exposure. If you were to wipe off the residue from the CASS test, you'd have a hard time telling they weren't new. Unlike the other brands, McGard lug nuts are designed and built to be used!

McGard tested their regular and bulge style acorn lug nuts against four competitors in a CASS (copper-accelerated acetic acid-salt spray) chamber. This test was developed by the American Electroplaters Society to measure the specific corrosion resistance of nickel-chromium platings. It involves subjecting plated parts to a salt solution at a specific temperature, pressure and length of time to emulate exposure to the elements.

Accelerated tests like this are employed by car manufacturers to measure quality and performance. A 22 hr. CASS cycle is considered to be equivalent to one year of exposure in Detroit weather conditions. Before each 22 hour CASS cycle the lug nuts were installed and removed using a lug wrench to simulate normal use.


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