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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
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      Size
      1. 1 1/2“
      2. 1 1/4“
      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“
      26. 6
      27. 7/16“
      28. 7/8“
      29. 8
      30. 9/16“
      31. No.1
      32. No.10
      33. No.12
      34. No.2
      35. No.3
      36. No.4
      37. No.5
      38. No.6
      39. No.8
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      TPI
      1. 10
      2. 11
      3. 12
      4. 13
      5. 14
      6. 16
      7. 18
      8. 20
      9. 24
      10. 32
      11. 4
      12. 4 1/2
      13. 40
      14. 48
      15. 5
      16. 56
      17. 6
      18. 64
      19. 7
      20. 8
      21. 9
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      Plug or Ring
      1. Plug Gauge
      2. Ring Gauge
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      Type
      1. Go
      2. Go/No-Go
      3. No-Go
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      Calibrated
      1. No
      2. Yes
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      Tolerance
      1. 2A
      2. 2B
      3. 3A
      4. 3B
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      Hand
      1. Left
      2. Right
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      Coating
      1. Oil Hardened
      Less
      Brand
      1. Insize
      2. JBO (Johs Boss)
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