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abachman3 · 12-22-2020, 12:15 PM

The bolt is sized on the outside diameter. The nut is actually sized based on what size bolt fits into it... thus the diameter of thee inside threads, not the outside threads.

12-22-2020, 12:15 PM	#4
abachman3 Senior Member Join Date: Jun 2013 Location: Western Springs, IL Posts: 324	Re: Dumb Question About Nut/Bolt Diameters The bolt is sized on the outside diameter. The nut is actually sized based on what size bolt fits into it... thus the diameter of thee inside threads, not the outside threads.