Are A563 Grade A standard hex nuts available larger than 1½” diameter?

No. According to the specification, A563 Grade A hex nuts, sometimes referred to as finished hex nuts, stop at 1-1/2” diameter. A563 Grade A nuts are only available larger than 1-1/2” diameter in a heavy hex pattern.

Portland Bolt stocks both import and domestic A563 Grade A standard hex and heavy hex nuts.


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