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Imperial and Metric Thread I.D.® Sets for Large Fasteners
These nut and bolt identifier sets allow you to check the size of both external and internal threads, including blind holes. The Imperial set includes UNC (coarse) and UNF (fine) from 1/4" to 1/2" in diameter. The metric set is for 6mm to 12mm, including common metric coarse, metric fine, and metric extra-fine threads.
Both sets come in steel cases with fitted interiors, clearly identifying nut and bolt combinations. In addition, each thread type has a unique plating color for easy sorting if there is any accidental intermingling.
The cases have spring hinges augmented with a magnetic closure so spilling is unlikely.
Large Thread I.D.® Set, Imperial
Large Thread I.D.® Set, Metric
Pair of Large Thread I.D.® Sets, Imperial & Metric
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