SAE and Metric Bolt Gauges Check a Thread Nut Fastener Size

Standard SAE Sizes Included: 6-32, 8-32, 10-24, 10-32, 12-24, 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, 9/16-12 Coarse, 9/16-18 Fine, 5/8-11 Coarse, 5/8-18 Fine, 3/4-10 Coarse, 3/4-16 Fine. Metric Sizes Included: M4-.7 Coarse, M5-.8 Coarse, M6-1.0 Coarse, M7-1.0 Coarse, M8-1.25 Coarse, M8-1.0 Fine, M10-1.5 Coarse, M10-1.25 Fine, M10-1.0 Extra Fine, M12-1.75 Coarse, M12-1.5 Fine, M12-1.25 Extra Fine, M14-2.0 Coarse, M14-1.5 Fine and M16-2.0 Coarse

Save a trip to the hardware store.
Heavy duty USA mold keeps bolts and nuts in place.
A must have for anyone who uses fasteners.
Quickly check thread sizes.