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Replacement Fin Screws

Get Some Replacement Surf Fin Screws

If you surf for long enough, the chances are good that you’re going to run into some issues when installing or removing your fin screws.

Rusted screws, stripped heads, stripped fin box threads. It has happened to many surfer before you and it can happen to you.

The difference between a potentially ruined session and an enjoyable surf is whether or not you’ve got some replacement hardware.

It’s always good to be prepared. That’s why you should stock up on some fin screws and handy fin tools before you run into problems.

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Futures Fin Screw Replacements

Replacement Futures Fin Screws

A replacement set of 12 Futures Fin grub screws and 3 fin keys.


FCS Fin Screw Replacements

Replacement FCS Fin Screws

A replacement set of 12 FCS fin screws and 3 fin keys.


Single Fin Thumb Screws

Single Fin Thumb Screws

A 3-pack of tooless thumb screws for your single fin box or SUP center fin.


Standard Flathead Center Fin Screw and Plate

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Center Fin Screw and Plate

If you’d simply like to replace the standard center longboard or SUP fin screw, you can order a 3-pack of stainless steel flathead screws and plates.

Surfboard Fin Screw Sizes

  • Futures grub screw: 10-32 x 1/2″
  • FCS grub screw: 10-24 x 5/16″
  • Bahne/FU/Standard Longboard/SUP Center Fin:
    • Screw: 10-32 x 3/4″
    • Plate: 1/2″ x 1/2″ x .15″

Fixing a Stuck or Stripped Fin Screw

These are the reasons to keep back-up fin screws on hand in first place. Rusted screws, seized screws, stripped screws, etc. – All of these are things that most surfers will experience at some point in their surfing experience.

If you’ve got a busted fin screw, chances are you’ll need a replacement – hence the recommendations above.

However, in some situations, you’ll need more than just a replacement screw. You’ll need a way to get the broken screw out or fix the stripped threads.

It’s not always easy, but there are a few methods you can try when dealing with stuck/rusted fin screws or stripped fin box threads.

To remove a stuck fin screw:

  • Soak it in penetrating oil or WD-40.
  • Try to back it out.
  • If it doesn’t work, glue a sacrificial fin key or allen wrench to the screw, allow it to dry, and remove it.

If the threads in your fin box are stripped, you can either:

  • Fill the screw hole with a quick set epoxy (plug the bottom first).
  • Allow the epoxy to set.
  • Use a #21 drill bit or bit smaller than your grub screw to drill through the center of the epoxy.
  • Use a new grub screw and tighten it through the hole to retap the threads.
    • OR
  • Use a slightly larger size tap and grub screw and retap the stripped threads.

Preventing Problems with your Fin Screws

You can prevent all of the above with a little preventative maintenance.

Be sure to rinse the salt water off your fin screws and fin boxes after a surf.

Avoid over-tightening your screws.

If you feel a bad (loose) seat between the fin key and the fin screw, don’t try to tighten or untighten it. Instead, find an allen key with a better fit, remove the screw, and replace it with a new one.

Best Surf Fin Tools

Having the right tools for the job makes your life a whole lot easier.

Bonus Tip: All of these could make excellent gifts for a surfer.

Below you’ll find some handy fin tools to deal with problem fin screws and everyday installation and removal of your surfboard fins.

Some great choices for the best surf tools include:

Fix Manufacturing – The Kraken Surf Tool

Kraken surfboard multi-tool

This is a pretty sweet multi-tool for all your surfing needs.

It includes a wax comb and scraper, hex key for FCS/Futures fins, spare leash rope, pick, flat head and phillips screw drivers, thread-tap, and a bottle opener.

This is a great tool to keep in your surf-mobile or your garage.


Fix Manufacturing Surf Fin Keychain Tool

Fix Manufacturing Keychain surf tool

This is another smaller multi-tool that includes 2 Phillips heads, a hex key, and a bottle opener/flat head screw driver combo that fold up into a leather holster.

Hook it to your surfmobile’s keychain and never be without the proper tools.


Surfboard FinPuller Tool

FinPuller Fin Removal Tool

Fins can be a little difficult to remove sometimes.

Some standard methods for removing a stubborn fin include wrapping it with a towel or banging it with a rubber mallet or wood block.

The FinPuller is designed to clamp around your fin to give you some extra leverage to get it out.

It’s certainly not a necessity, but it can come in handy if you’ve got some particularly tight fin boxes or find yourself changing fins frequently.

Made from recycled plastics.


Backup screws & proper fin tools – a must have for any surf kit.

Fin screws are like that commercial for the bail bond dude’s phone number – it’s better to have it and not need it than to need it and not have it.


Do you have experiences with any of the fin screws or tools described above? Maybe you’re a fan of something we’ve missed? Let us know in the comments below!

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