I was a sales rep for a hardware company named Wurth USA. I can tell you that very few nuts and bolts are made here in the US. Most are made in taiwan,india and china.
The grade markings for grade 5 are three slashes, grade 8 has 5 slashes. Most of the Home Depot and lowes hardware is less than grade2! I always make sure that they are ansi rated.
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If the only tool you have is a hammer,
Then all your problems look like nails.
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