Nut and Bolt Size Conversions

Convert between metric (M-size) and imperial (SAE) bolt and nut sizes.
Includes thread pitch, head size, and wrench size equivalents.

Nut and Bolt Size Converter

Convert metric (M3-M24) to imperial bolt and nut sizes with wrench equivalents, thread pitch naming, and metric vs SAE grade markings for hex bolts.

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