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    Thread Gauges

    Huge range of sizes and thread forms available from Insize and premium German supplier Johs Boss. Go and No-Go Thread Plug & Ring gauges in different tolerances.

      Shop Now Metric Coarse Thread Gauges

      Go & No-Go Plug & Ring gauges from Insize & premium German supplier JBO in metric coarse thread form.

      Shop Now Metric Fine Thread Gauges

      Go & No-Go Plug & Ring gauges from Insize & premium German supplier JBO in metric fine thread form.

      Shop Now 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 UNF (Unified National Fine) Thread Gauges

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

      Shop Now BSP(G) (British Standard Pipe) Thread Gauges

      Go & No-Go Plug & Ring gauges from Insize & premium German supplier JBO in British Standard Pipe (BSP(G)) thread form.

      Shop Now BSPT (British Standard Pipe Taper) Thread Gauges

      Go & No-Go Plug & Ring gauges from Insize & premium German supplier JBO in British Standard Pipe Taper (BSPT) thread form.

      Shop Now BSW (British Standard Whitworth) Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in British Standard Whitworth (BSW) thread form.

      Shop Now BSF (British Standard Whitworth Fine) Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in British Standard Fine (BSF) thread form.

      Shop Now NPT (National Pipe Taper) Thread Gauges

      Go & No-Go Plug & Ring gauges from Insize & premium German supplier JBO in National Pipe Taper (NPT) thread form.

      Shop Now NPTF (National Pipe Taper Fine) Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in National Pipe Taper Fine (NPTF) thread form.

      Shop Now UN (Unified National) Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in Unified National (UN) thread form.

      Shop Now UNEF (Unified National Extra Fine) Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in Unified National Extra Fine (UNEF) thread form.

      Shop Now UNJC Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in UNJC thread form.

      Shop Now Trapezoidal Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in Trapezoidal (Tr) thread form.

      Shop Now Thread Repair Thread Gauges

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

      Shop Now PG (Steel Conduit) Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in Steel Conduit (PG) thread form.

      Shop Now Metric Fine Conduit Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in Metric Fine Conduit thread form.

      Shop Now PG Thread Gauges

      Go & No-Go Plug & Ring gauges from premium German supplier JBO in PG thread form.

      Shop Now UNC (Unified National Fine) Thread Gauges
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    Category
    1. Metric Coarse Thread Gauges 1258
    2. Metric Fine Thread Gauges 6581
    3. UNC (Unified National Coarse) Thread Gauges 512
    4. UNF (Unified National Fine) Thread Gauges 450
    5. BSP(G) (British Standard Pipe) Thread Gauges 383
    6. BSPT (British Standard Pipe Taper) Thread Gauges 82
    7. BSW (British Standard Whitworth) Thread Gauges 120
    8. BSF (British Standard Whitworth Fine) Thread Gauges 90
    9. NPT (National Pipe Taper) Thread Gauges 90
    10. NPTF (National Pipe Taper Fine) Thread Gauges 52
    11. UN (Unified National) Thread Gauges 143
    12. UNEF (Unified National Extra Fine) Thread Gauges 234
    13. UNJC Thread Gauges 156
    14. Trapezoidal Thread Gauges 90
    15. Thread Repair Thread Gauges 120
    16. PG (Steel Conduit) Thread Gauges 0
    17. Metric Fine Conduit Thread Gauges 80
    18. PG Thread Gauges 76
    19. UNC (Unified National Fine) Thread Gauges 60