Stainlesstown Nut Bolt Thread Gauge (Green)
Nut and bolt sizing gauge. Made of heavy duty plastic with bolt thread sizing molded into the back of the gauge. Simple to use, just match hole sizes with your bolt or nut and read the size. Thread pitch is done by matching the sample pitches on back. Measures #4 to 1 inch standard and 3mm to 22mm metric bolts and #6 to 5/8 nuts.
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