6 Spline Lug Nut Key Sizes Chart. The most common lug nut sizes are:. While there is no universal lug nut size, there are fortunately only about ten or so thread sizes and pitches that make up a lug nut’s size.

The most common lug nut sizes are:. While there is no universal lug nut size, there are fortunately only about ten or so thread sizes and pitches that make up a lug nut’s size. If you’re looking to replace your old socket set, check out our review of the best socket sets for.