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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 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.