| McGard wheel locks & lug nuts for boat trailers are machined from high quality steel, through-hardened and then triple-nickel chrome plated. For boat trailers with steel or alloy wheels with cone seats, simply replace one of the lug nuts with a McGard wheel lock, that's it. Our wheel locks and lug nuts are 1/2"-20 cone seat. Note, most OEM trailer wheels use 1/2"-20 cone seat lug nuts. Skin packaged. Additional Info Please be sure to verify your thread size prior to ordering. See the MORE PHOTOS link for thread sizes of the McGard products. McGard
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