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Superlok i-Fitting compression tube fitting with built-in gap gauge being tightened with a wrench

Superlok i-Fittings: Tube Fittings With Built-In Gap Gauge Technology

August 18, 2026

A Simpler, More Consistent Way to Install Tube Fittings

Proper tube fitting installation is critical for creating a secure, reliable connection in fluid and instrumentation systems. Over- or under-tightening a compression tube fitting can contribute to leaks, connection failures, and unnecessary rework. Superlok® i-Fitting technology is designed to take the guesswork out of tube fitting installation. Each i-Fitting incorporates a patented, built-in gap gauge that provides a clear indication when the fitting has reached the proper compression point.

 

Instead of relying solely on installer feel or using a separate gap inspection gauge, installers simply tighten the fitting until the check ring separates from the fitting body. This provides a clear indication that installation is complete.

 


 

Watch the Superlok i-Fitting Installation Video

See how Superlok i-Fittings are installed and learn how the built-in check ring helps provide a consistent tube fitting connection.

 

 


 

 

Weimer Bearing is a Distributor for Superlok i-Fittings

 

Benefits of Superlok i-Fitting Technology

  • Consistent Installation — Built-in check ring provides a clear indication when installation is complete, helping installers achieve consistent connections.
  • Reduced Installation Errors — Defined stopping point helps address over- and under-tightening, two common sources of tube fitting installation problems.
  • Faster Installation — Built-in gap gauge eliminates the need to locate and use a separate gap inspection tool after installation.
  • Improved Installation Confidence — Visual confirmation and check ring separation provide an immediate indication that the fitting has reached the proper compression point.
  • Broad Product Selection — Superlok offers a wide range of compression tube fittings incorporating i-Fitting technology, including tube unions, reducing unions, connectors, adapters, bulkhead fittings, and more.

 


 

Need Help Selecting the Right Tube Fitting?

Weimer Bearing & Transmission supplies Superlok compression tube fittings and i-Fittings for industrial applications. Our team can help identify the appropriate fitting style, size, material, and configuration for your application.