SAE and Metric Nut and Bolt Gauge Thread Checkers Tired of going to the hardware store only to find out you left the bolt or nut at home? Save a trip to the hardware store and quickly check thread sizes. Made of a durable plastic resin in a convenient 24" wide tool. All the popular thread sizes including course and fine threads. Hi contrast lettering so you can quickly and easily find your thread. Red tool for metric and blue tool for standard SAE. Standard SAE Thread Sizes: 6-32, 8-32, 10-24, 10-32, 12-24, 1/4-20, 1/4-28 Fine, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 9/16-12, 9/16-18, 5/8-11, 5/8-18, 3/4-10, 3/4-16 Metric Thread Sizes: M4-.7, M5-.8, M6-1.0, M7-1.0, M8-1.25, M8-1.0, M10-1.5, M10-1.25, M10-1.0, M12-1.75, M12-1.5, M12-1.25, M14-2.0, M14-1.5, M16-2.0 Dimensions: 24" Wide x 5-5/8" Tall x 4-1/4" Deep