Precision Extension Springs

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Mid To High Volume Extension Springs Are Skillfully Manufactured and Delivered On-time

An extension spring is designed to store energy and exert a pull action. Extension springs have a wide load and deflection range that can be achieved and a constant rate. Extension springs are usually close wound with initial tension and are mostly made from round wire. The design possibilities of extension spring ends are limitless and are expertly manufactured to your specifications. 

Extension Spring Specifications

Patrick Manufacturing offers customizable extension spring specifications for varying applications and industry uses. Custom specification include spring ends and materials, including:

Custom Ends

  • Threaded inserts
  • Loops
  • Swivel hooks
  • Twist loops
  • Cross-center loops
  • Side loops
  • Extended hooks
  • Machine hooks

Extension Spring Materials

  • Carbon Steel
  • Stainless Steel
  • High Strength Alloys
  • Oil Tempered
  • Galvanized
  • Phos Bronze
  • Beryllium

Not seeing what you’re looking for? Give us a call to learn more about our custom spring ends and materials!

Production Quantities for YOUR Industry

At Patrick Manufacturing, we proudly produce extension springs on state-of-the-art CNC spring coilers and formers. We manufacturer to your exact specifications, such as:

  • Number of Coils
  • ID / OD
  • Wire Diameter
  • Overall Lengths
  • Pitch
  • Rate

Contact Us today to learn about all of the specifications we specialize in!


Featured is an extension spring with a unique end  produced on a 16 axis CNC spring coiler with .052" galvanized music wire (OD .455") commonly used in restaurant equipment at an EAU of 25,000.

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