Star Nut

• for 1 1/8" steerer
• also called Star Fangled Nut

Notes:

A Star Nut is special nut that is designed to be hammered into the steerer of a bicycle with a threadless headset. The adjusting bolt screws into the "Star Fangled Nut."

The star-fangled nut has two barbed steel flanges that allow it to be forced downward into the steerer, but which prevent it from moving upward.

If you ever need to remove a star nut, the easiest way is by driving it down and out the bottom of the steerer with a hammer and punch.

Star nuts are only for use on metal steerers and should never be used on carbon steerers. Forks with carbon steerers generally come with special expansion plugs that serve the function of a star nut, without the sharp edges that might damage the fragile carbon steerer.