Tension Nut

(9 reviews) Write a Review
  • Tension Nut
  • Tension Nut
  • Tension Nut


This is a brass tension nut that will allow you to apply tension or simply hold in place the OpenBuilds custom lead screws.  It has an M5 set screw to ensure a no slip lock when set in the desired position. Learn more on how to use the tension system with our Tension based actuators


  • Strong brass construction
  • Easy and Fast installation
  • Compatible with our customized 8mm Metric Acme Lead Screws

What is Included

  • (1) Tension Nut
  • (1) Steel Set Screw

Product Specifications

  • OD: 13mm Hex nut
  • Thread: Tr8*8 (compatible with our customized 8mm Metric Acme Lead Screws)
  • Material:  Brass/ Steel set screw

Assembly/Support/Documentation/3D Models

Easy follow along assembly video – top notch awesome community support – open source files and documentation and examples.

Support CAD Files

This design or build includes OpenBuilds®, LLC design work(s) shared Open Source under the CC BY-SA 4.0 License Terms and Conditions

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9 Reviews

  • 5
    Tension Nut

    Posted by David Schimel on May 16th 2022

    I removed the stop caller and replaced it with the tension nut then a precision spacer then the bearing. Locking the tension nut placing pressure on the tension nut.

  • 5
    Tension Nut

    Posted by Ron on Dec 23rd 2020

    Superior solution to locking nut in "compression" lead screw builds and a must have in tension builds. Will be converting all four of my lead screws to tension with these nuts and thrust bearings.

  • 5
    A must have

    Posted by Michael on Sep 21st 2020

    It worked so well I replaced all my shaft collar set screws on my cnc.

  • 5
    Tension Nut

    Posted by Corey on Sep 11th 2020

    The fit on the OB lead screw is flawless. They have good smooth contact to the lead screw. And I like the bigger grub screw. I am using these for locking nuts to hold thrust bearing and lead screw in place.

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