Threaded Sight Windows

sight window S-5100sight window S-5400

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


Sight Windows – Normal Service to 150 psig

Model S-5100 Female Threaded Sight Window (T400.54)
Model S-5400 Male Threaded Sight Window (T400.59)

Jacoby-Tarbox Installation, Operating & Maintenance Instructions (T500.1)