The Original Thread Checker is an accurate and easy-to-use thread verifier for both nuts and bolts. Conveniently assembled onto a wire loop, it is especially well suited for distinguishing between similar inch and metric threads.

Made in U.S.A.

Specifications

• Each size has a nut and bolt checker on the same gauge

• Thread sizes are permanently stamped onto each gauge

• Inch gauges are clear zinc plated, metric gauges are black oxide

• Wire cable with loop for convenient hanging 

SAE 23 Piece Set

Inch Sizes:

6-32	10-32	5/16-24	7/16-20	9/16-18	3/4-16
6-40	1/4-20	3/8-16	1/2-13	5/8-11	1-8
8-32	1/4-28	3/8-24	1/2-20	5/8-18	1-12
10-24	5/16-18	7/16-14	9/16-12	3/4-10

 

Metric 21 Piece Set

Metric Sizes:

M3x0.5	M7x1.0	M10x1.25	M12x1.75	M16x2.0	M24x3.0
M4x0.7	M8x1.0	M10x1.5	M14x1.5	M20x1.5
M5x0.8	M8x1.25	M12x1.25	M14x2.0	M20x2.5
M6x1.0	M10x1.0	M12x1.5	M16x1.5	M24x2.0