The job
For the named 1 and 1-1/8-inch systems using standardM6 star nuts; hammer and nut separate.
Park Tool · Star-nut setter
Park Tool TNS-1 Star Nut Setter
For the named 1 and 1-1/8-inch systems using standardM6 star nuts; hammer and nut separate.
$28.95Nov 7, 26, 01:00 AM · New York
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- Named systems 1 and 1-1/8 in
- Nut receiver StandardM6
- Maker setting depth 15 mm
Named systems
1 and 1-1/8 in
Match the actual retention requirement
Use the fork’s prescribed system, not an assumption that every threadless headset uses a star nut.
What this choice changes
A simple driver with a stated 15 mm setting depth
The TNS-1 is a manual driver for the star-fangled nut in the supported threadless-headset system. Park Tool states a 15 mm setting depth and a standardM6 nut receiver. Choose it only when the fork maker permits that retention system, rather than selecting solely from a matching steerer size.
The long handle is driven with a separate hammer. Compared with TNS-4, it is the simpler driver format without that model’s surrounding guide architecture. The different guide arrangement is a real operating choice within the same installation task.
A replacement 822 set screw is separately identified by the maker. Neither that service part nor a new star nut or hammer is established as extra supplied equipment. The driver does not install an expansion plug or provide general permission for a carbon-column setup.
Specifications & supplied details
| Detail | Specification |
|---|---|
| Model | TNS-1 |
| Named systems | 1 and 1-1/8 in |
| Nut receiver | StandardM6 |
| Maker setting depth | 15 mm |
| Operation | Manual driver; separate hammer |
| Service part | Replacement 822 set screw |
| Supplied | One setter |
Choose for your actual setup
Match the actual retention requirement
Use the fork’s prescribed system, not an assumption that every threadless headset uses a star nut.
Choose the guide format
Compare the simple driver with TNS-4’s surrounding guide if that feature matters to the approved setup.
Fit checks & limits
- Not an expansion-plug tool or universal carbon-steerer permission.
- No damage-free installation guarantee or additional nut/hammer included.
Questions before you choose
Does it include a star nut?
No star nut is established as supplied with this setter.
What does TNS-4 add?
It uses a surrounding guide, while this model is a simpler driver with its own stated 15 mm depth.
Can it replace an expansion-plug tool?
No. The retention systems and receiving contacts are different.
Guides for this choice
Alternatives to compare
Selected listing details, manufacturer information and source images were compared. No hands-on trial or universal fit is claimed. Product identifier: B000WYCHO6.