TNS-4 1” and 1-1/8” Star Nut Setter

Description

The Park Tool USA TNS-4 1” and 1-1/8” Star Nut Setter is a precision bike tools solution designed to install star-fangled nuts in threadless headset systems. Ideal for home mechanics and shop use, it fits forks and steerers using 1-inch and 1-1/8-inch standards for fast, accurate setup.

• Designed for 1” and 1-1/8” threadless headset systems using a standard M6 threaded star-fangled nut. ([parktool.com](https://www.parktool.com/en-us/product/deluxe-threadless-nut-setter-tns-4?utm_source=openai))
• Replaces or matches the Park Tool TNS-4 deluxe threadless nut setter specification for precise star nut installation. ([parktool.com](https://www.parktool.com/en-us/product/deluxe-threadless-nut-setter-tns-4?utm_source=openai))
• Features a replaceable set screw, identified by Park Tool as part #822, for long service life and easy maintenance. ([parktool.com](https://www.parktool.com/en-us/product/deluxe-threadless-nut-setter-tns-4?utm_source=openai))
• A dependable misc. tools TNS- /” star nut setter replacement option for bicycle repair benches, service kits, and fork assembly work.

Built with a durable steel driver and an integrated guide, the TNS-4 helps align the star-fangled nut squarely in the steerer and sets it to the proper depth with consistent results. Park Tool notes that its unique design also helps reduce the chance of pinched fingers during installation. This is an OEM Park Tool USA service tool rather than a generic aftermarket copy, making it a smart choice when accuracy matters. If you need a park tool usa tns- /” star nut setter for routine headset service, this tool offers straightforward, moderate-difficulty DIY use with a hammer or mallet. ([parktool.com](https://www.parktool.com/en-us/product/deluxe-threadless-nut-setter-tns-4?utm_source=openai))

Trusted workshop performance, OEM-quality construction, and easy repeatable results—ships same day from our warehouse.