Tubing and Components

Tubing Selection


SAE J524 Seamless tubing is perfectly suitable for bending and flaring. J524 is a cold drawn and annealed carbon steel tubing intended for use in hydraulic pressure lines.

SAE J525 Welded Tubing is best suited for pressure lines in applications requiring high-quality tubing for bending, flaring, forming, and brazing. This tubing is made from flat-rolled steel shaped into a tubular form where the edges are joined and fused together by electric-resistance welding.  After forming and welding, the tubing is then normalized and subjected to a cold-drawing operation. Following cold working, the tubing is then normalized via an atmospherically controlled method to produce a finished product meeting the requirements of SAE J525.

  • Sizes: 1/8" - 2" OD
  • Wall Thickness: .035" - .120"
  • Finishes: Trivalent Zinc, Unplated, Chromium 6 (CR6)


  • Sizes: 1/8" - 1-1/2" OD
  • Wall Thickness: .035" - .120"
  • Grades: 304 & 316 Stainless

Due to its excellent general corrosion resistance, high strength-to-weight ratio and remarkable ductility, stainless steel has become the predominant material choice for hydraulic and instrumentation tubing. The two grades of stainless steel most common are dual certified 304/L and 316/L.


  • Sizes: 1/8" - 3" OD
  • Wall Thickness: .028" - .625"
  • Finishes: Unplated

DOM (Drawn over Mandrel) Round Mechanical Tubing is a cold drawn welded tube best suited for mechanical and structural applications. In comparison to other tubing, DOM round steel tubing is produced to more exact OD and ID tolerances, and has the highest weld strength possible.


  • 6mm - 50mm
  • Wall Thickness: .5 mm - 5 mm
  • Finishes: Trivalent Zinc


Depending on your application, special alloy tubing may be required. Mid-State offers plenty of special alloys such as copper, aluminum, and nickle. If your application required specialty alloys, please contact us to let us know how we can help.

Tube Assemblies

For decades, manufacturers have come to Mid-State for their metal tube assemblies because of our precision engineering and quality control practices. Thanks to our comprehensive tube processing services, our assemblies have been used to improve the performance of a number of fluid transfer, fuel, oil, lubrication, automotive, military, and structural applications.

Tube Assemblies

Tube End Connections

Mid-State offers multiple tube end connection types for your convenience. Our portfolio of braze and weld components, slip on nuts and sleeves, flareless bite-type, and Eaton Walterscheid compression fittings guarantee you can make the right connection, every time. View some of our offering below, and don't hesitate to contact us with questions or requests.


Need help finding the right product, or assistance with a project? Our team of experts can assist with everything from product specifications to engineering, design, and routing. We also offer several quality testing services to help ensure your products stand the test of time. Contact us today to learn more.

Contact Us

Tube Assembly Advantages

Tube assemblies offer several performance advantages over traditional rubber hose, such as greater operating temperature, longer service life, smaller allowable bend radius, and improved ease of installation. Check out our case studies below to see how we've helped our customers improve their system performance.

Case Studies & Resources