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JEGS Bolt & Nut Gauge
This simple-to-store plastic bolt & nut gauge makes easy work out of what is often a tough task. Assists you in determining SAE #4 to #10, 1/4" to 1", and 3mm to 22mm bolt sizes plus SAE #6 to #10 and 5/16" to 5/8" nut sizes. Includes inch and metric rulers to measure bolt length while the other side has a handy thread guide to verify SAE 10 to 40 threads per inch and .70 to 2.5 metric thread pitch. Made in the USA.