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Thomson BSA® precision lead screws are an excellent economical solution for your linear motion requirements. For more than 25 years, Thomson BSA has designed and manufactured the highest quality lead screw assemblies in the industry. Our precision rolling machines ensure accurate positioning to 0.003 in/ft and our PTFE coating process produces assemblies that have less drag torque and last longer.



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Screw Diameter

Screw Lead

Axial Load


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CAD Models

  • Configurable 2D/3D Partstream Models
  • Configurable 2D/3D Solidcomponents Models
  • Configurable 2D/3D PartServer Models
  • Static 2D/3D Model file downloads

NOTE: Please use Internet Explorer 11, Edge, Firefox, or Google Chrome with Edrawings Viewer

Partstream Interactive Viewer Instructions:
1) Select a product from the table below and Configure your model to the right of the viewer that appears.
2) Click the Create button at the bottom of the configurator and wait for model to load (may take a few minutes).
3) Click the Download tab and login to your account if requested (or register as a first-time user).
4) Select a format, wait for the file to be created (may take a few minutes), and click the Download button.

Lead Screws (Supernuts) 2D/3D Interactive Models
XC Advanced Anti-Backlash Supernuts
AFT Advanced Anti-Backlash Supernuts
SNAB Anti-Backlash Supernuts
MTS Flange Mount Style Supernuts
SN Thread Mount Style Supernuts
SB Metric Thread Mount Style Supernuts
BN Bronze Thread Mount Style Supernuts
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