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Threaded Sight Windows

Jacoby-Tarbox manufacturers sight windows with both male and female threaded connections.  Specialty UniGlas sight plugs are available up to 4000 psig (275 bar).


  • UniGlas sight plugs feature fused glass, eliminating all seals and leak paths

  • Standard windows, with replaceable glass and gaskets, available to 150 psig / 10.3 bar (consult factory for higher pressures)

  • Standard windows available with quartz glass for service temperatures up to 2012°F / 1100°C

  • Custom sizes are available

S5400 threaded sight window
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