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Check the listing for details. Blue Vertical SAE and Metric Bolt Gauge Thread Checker. Condition: New. Listed at 48.99 USD. All the popular thread sizes including course and fine threads. Standard SAE Sizes Included: 6-32, 8-32, 10-24, 10-32, 1/4-20 Coarse, 1/4-28 Fine, 5/16-18 Coarse, 5/16-24 Fine, 3/8-16 Coarse, 3/8-24 Fine, 7/16-14 Coarse, 7/16-20 Fine, 1/2-13 Coarse, 1/2-20 Fine.