Standard thread sizes included (37 blue gauges) – Covers common UNC and UNF sizes including2-56, 2-64, 3-48, 4-40, 6-32, 8-32, 10-24, 10-32, 1/4", 5/16", 3/8", 1/2", 5/8", 3/4", 7/8", and 1" thread sizes.
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