DELUXE THREADLESS NUT SETTER PARK TOOL TNS-4

The Park Tool TNS-4 is the deluxe threadless nut setter, designed to install star-fangled nuts quickly and cleanly in fork steerer tubes with 1" and 1 1/8" threadless headsets. It turns an often approximate job into a precise, repeatable operation, whether at the shop bench or in your home workshop. A star nut installed crooked or at the wrong depth complicates the whole headset adjustment: the TNS-4 is made to prevent exactly that.

At the heart of the TNS-4 is a durable steel driver combined with a built-in guide: the guide sits on the steerer and keeps the star nut perfectly aligned, while the driver pushes it into place to the correct depth, the same every time. The unique design keeps hands away from the work area and virtually eliminates pinched fingers. The set screw is replaceable (Park Tool part #822), so the tool can be kept in top condition over time.

How the threadless nut setter works

• The standard M6 star nut is installed in the fork steerer using the steel driver.
• The built-in guide keeps the star nut in line with the steerer, so it cannot go in crooked.
• The steel driver sets the star nut to the correct depth consistently.
• The tool design keeps fingers away from the installation point.
• Useful when fitting a new fork, replacing a fork or when the star nut installation has to be redone.

Why choose Park Tool TNS-4

• Perfect star nut alignment thanks to the built-in guide.
• Correct, repeatable insertion depth on every installation.
• Durable steel driver, suited to daily use in the workshop.
• Design that protects fingers during installation, for safer and faster work.
• Compatible with 1" and 1 1/8" threadless headsets using a standard M6 threaded star-fangled nut.
• Set screw replaceable with a genuine Park Tool spare part.

For anyone who installs and adjusts headsets regularly, the Park Tool TNS-4 deluxe threadless nut setter is the most practical way to get a straight, centred star nut at the right depth every time, without damaging the steerer and without risk to your hands.