The Patented True Spike lug nuts are the new standard of the industry, CNC machined forged steel with a threaded end and rubber o-ring to be able to mount any of the True Spike billet aluminum lug nut caps. The o-ring will put pressure on the cap when tightened down so that your caps will not fall off.     These lug nuts are available in 2 lengths, 41MM and 51MM: - All 12x1.5MM, 12x1.25MM, 7/16-20, 1/2-20 are 41MM long. - All 12x1.75mm, 14x2.0MM and 9/16-18 are 51MM long. The 14x1.5MM is available in both 41MM and 51MM. - All cars use 41MM, but they can use the 51MM if you want a little more length. - Most trucks need to use the 51MM. If unsure what you need for your truck always buy the 51MM as that one will always work. The 41MM will bottom out on the stud of some trucks. US Patent: D786,056...

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