If your tuttle or power box fins have become unusable due to stripped threads, this Brass Barrel Nut 6 mm x 9 mm can help you and your fins sail sm...

If you stripped out your fin inserts you will be ok, just replace the barrel nut. 1/4-20 is commonly used for Tuttle fins, but not necessarily. ...

Barrel nut for fins.

If you stripped out your fin inserts you will be ok, just replace the barrel nut. 1/4-20 is commonly used for Tuttle fins, but not necessarily. ...

Assorted flavors.