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Spin-Pull vs Spin-Spin Nutsert Tools
Both these tools are used to install rivnuts / nutserts, but they work very differently mechanically. Before we dive into the differences between these two tools types, lets cover some rivnut tools basics. A nutsert gun is used to install nutserts (also known as rivnuts or riveted nuts). It works by pulling and deforming the nutsert so it grips the material on the blind side, leaving behind a secure, load-bearing threaded insert. Once installed, you can screw bolts into it just like a normal nut.
Spin-Pull Nutsert Tool (Thread-Pull Type)
How it works
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The mandrel screws into the nutsert (spin).
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The tool then pulls the mandrel backward, collapsing (upsetting) the rivnut.
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The tool automatically reverses and unscrews the mandrel from the installed nutsert.
Key characteristics
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Uses a linear pulling force, not torque, to set the nutsert.
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Very consistent installations.
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Handles steel and stainless steel rivnuts, including larger sizes (M6–M12).
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Most pneumatic/hydraulic nutsert tools are spin-pull.
Pros
✔ Strong, reliable installs
✔ Works with tougher materials
✔ Lower chance of spinning the rivnut in the hole
✔ Good for production work
Spin-Spin Nutsert Tool (Torque-Set Type)
How it works
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The mandrel screws into the nutsert (spin).
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The tool continues to spin, and the torque causes the nutsert to collapse against the material.
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The tool then reverses to unthread from the nutsert.
Key characteristics
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No linear pulling action; the deformation is caused purely by continued rotation.
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Works best on aluminium or soft steel rivnuts, typically small sizes (M3–M6).
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Common in cheaper electric drill-style rivnut tools.
Pros
✔ Cheaper tools
✔ Simple mechanism
✔ OK for light-duty work
Cons
✘ Easy to under-set or over-set
✘ Not suitable for stainless steel rivnuts
✘ More likely to make the nutsert spin in the panel
✘ More sensitive to hole tolerance
Summary Table
| Feature | Spin-Pull | Spin-Spin |
|---|---|---|
| How it sets | Pulls mandrel to collapse rivnut | Keeps spinning to collapse rivnut |
| Force type | Linear pulling | Rotational torque |
| Material capability | Aluminium, steel, stainless | Mostly aluminium / soft steel |
| Size range | Small → large (M3–M12) | Mostly small (M3–M6) |
| Reliability | High | Medium/low |
| Best use | Professional, production, structural | Light-duty, DIY |
Which is better?
For consistent, strong, repeatable installations, a spin-pull tool is the superior system.
A spin-spin tool is fine for occasional light aluminium rivnuts, but not for anything structural or stainless. Looking at buying a nutsert tool? Contact the nutsert tool experts on 02 9755 3747 or via the contact us page. Looking to understand nutserts tools better? Click here to visit the nutsert tool blog.
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