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Unread 08-25-2014, 08:55 PM   #1
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Default Confused about lug nut sizes

Why are most lug nuts listed as 12mm but take a 19mm socket? What am I missing?

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Unread 08-25-2014, 09:05 PM   #2
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A fastener is described by the thread size, not the hex size, or wrench size.

A 1/2" bolt usually has a 3/4" hex.

An 8 mm bolt usually has a 12 or 13 mm hex.
2003 GMC Envoy 5.3

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