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      UNC (Unified National Coarse) Thread Gauges

      Go & No-Go Plug & Ring gauges from Insize & premium German supplier JBO in unified national coarse (UNC) thread form.

        Shop Now UNC Plug Gauges
        Shop Now UNC Ring Gauges
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      3. 1 1/8“
      4. 1 3/4“
      5. 1 3/8"
      6. 1 3/8“
      7. 1/2"
      8. 1/2“
      9. 1/4"
      10. 1/4“
      11. 1“
      12. 2 1/2“
      13. 2 1/4“
      14. 2 3/4"
      15. 2 3/4“
      16. 2“
      17. 3/4"
      18. 3/4“
      19. 3/8"
      20. 3/8“
      21. 4
      22. 5/16"
      23. 5/16“
      24. 5/8"
      25. 5/8“
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      27. 7/16“
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      30. 9/16“
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      16. 56
      17. 6
      18. 64
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      21. 9
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