Park Tool Threadless Nut Setter - QKTNS1
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Product Information
Full details
The Park Tool TNS-1 Threadless Nut Setter is a professional-grade workshop tool designed for home mechanics and bike shop technicians who need to install star-fangled nuts into threadless headset systems with precision. Its primary benefit is ensuring the star nut is driven to the exact 15mm depth required for proper headset adjustment, while preventing it from tilting or becoming misaligned within the fork steerer. A notable caveat is that this tool requires the use of a hammer, meaning users must exercise care and proper technique to avoid damage to the fork or the star nut itself.
All features
| Model Part Number | QKTNS1 |
|---|---|
| Brand | Park Tool |
Extended Product Information
FAQs
Can I use this with carbon fiber forks?
No. The TNS-1 is intended for steel and aluminum steerer tubes only. Carbon forks use an expansion plug.
Does it work with 1.5 inch tapered steerers?
The TNS-1 is designed for 1 inch and 1-1/8 inch systems. It will work on the 1-1/8 inch portion of a tapered steerer.
How do I remove the tool once the nut is set?
Simply unscrew the handle/driver from the star nut once the star nut has reached the 15mm depth.
What kind of hammer should I use?
A standard ball-peen or rubber mallet is sufficient, though a shop-grade dead blow hammer provides the most controlled impact.
Is the depth adjustable?
No, the depth is fixed at 15mm to ensure standard compatibility with most stem top caps.
Troubleshooting
Star nut is difficult to drive into the steerer tube
Apply a small amount of bicycle grease to the circumference of the star nut to reduce friction.
Star nut tilted after installation
Ensure the TNS-1 is held perfectly vertical during the entire striking process and that the steerer tube end is filed flat.
Pros and Cons
Pros
- Ensures perfectly straight star nut installation every time
- Provides a consistent 15mm depth setting automatically
- Ergonomic handle protects fingers from hammer strikes
- Compatible with the most common steerer tube standards
- Extremely durable construction for long-term reliability
Cons
- Requires a separate hammer for operation
- Not compatible with carbon fiber steerer tubes
- Can be overkill for one-time users
Setup, Compatibility & Care
Setup:
- Ensure the star nut is threaded securely onto the TNS-1 driver tip.
- Apply a thin layer of grease to the outside of the star nut to ease the insertion into the steerer tube.
- Insert the assembly into the fork steerer and ensure the tool is held vertically.
Compatibility:
The TNS-1 is designed for 1-inch and 1-1/8 inch steel and aluminum steerer tubes. Note that it is not intended for carbon fiber steerers, which require specific expansion plugs instead of star nuts.
Care:
- Wipe the tool clean of metal shavings and dust after each use.
- Check that the threads on the driver tip remain clean to prevent stripping the star nut.
- Store in a dry environment to prevent surface corrosion.