Weld Fittings

For ultra-high purity applications, Hy-Lok weld fittings are electro-polished and packed in triple vinyl bags in a Class 10 environment.

Hy-Lok Weld Fitting features include:

  • Tapered socket weld ports to speed layout for proper tube fit and tube alignment.
  • Automatic tube weld and butt weld design
  • Size range from 1/8″ thru 1″ O.D. tubing
  • Mini and long tube end design

Instrument Weld Fitting Benefits:

Hy-Lok USA weld fittings are high quality, so they will perform well under a multitude of conditions, minimizing contamination or unwarranted failure. Using a proven manufacturing approach, Hy-Lok consistently exceeds the required performance requirements and offers exceptional results for all industries requiring weld fittings to get their jobs done.

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Instrument Weld Fitting Temperature Ratings




-325°F- 1200°F (-198°C - 648°C)


-325°F - 400°F (198°C - 204°C)

Carbon Steel

-20°F - 350°F (-29°C - 176°C)


For full details, view our catalog on Instrument Weld Fittings. One of our representatives will gladly assist you with your production selection or answer any questions you may have regarding our fittings.


If you have any questions about any of our products or services, don’t hesitate to give us a call. For any inquiries, fill out the form and one of our Hy-Lok representative will contact you soon.


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