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      Thread Repair Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in Thread Repair (STI) thread form.

        Shop Now 6H STI Metric Coarse Plug Gauges
        Shop Now 6H STI Metric Fine Plug Gauges
        Shop Now STI Unified Coarse Plug Gauges
        Shop Now STI Unified Fine Plug Gauges
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      1. 1/2“
      2. 1/4“
      3. 3/8“
      4. 5/16“
      5. 5/8“
      6. 7/16“
      7. M10
      8. M12
      9. M14
      10. M16
      11. M18
      12. M2
      13. M2.5
      14. M20
      15. M22
      16. M24
      17. M3
      18. M4
      19. M5
      20. M6
      21. M7
      22. M8
      23. No.10
      24. No.12
      25. No.2
      26. No.4
      27. No.5
      28. No.6
      29. No.8
      Less
      Pitch
      1. 0.4
      2. 0.45
      3. 0.5
      4. 0.7
      5. 0.8
      6. 1
      7. 1.25
      8. 1.5
      9. 1.75
      10. 2
      11. 2.5
      12. 3
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      TPI
      1. 1
      2. 1.25
      3. 1.5
      4. 11
      5. 13
      6. 16
      7. 18
      8. 20
      9. 24
      10. 28
      11. 32
      12. 36
      13. 40
      14. 48
      15. 56
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      Thread Form
      1. STI Metric Coarse
      2. STI Metric Fine
      3. STI UNC
      4. STI UNF
      Less
      Calibrated
      1. No
      2. Yes
      Less
      Tolerance
      1. 2B
      2. 3B
      3. 6H
      Less