Attach your SUP fin easily and reliably with the EvoNautic US Fin Box Bolt and Nut. Thanks to its universal fit, this set is suitable for all brands of SUPs. The wing design makes this nut easy to tighten by hand, without the need for tools. The thread is M4 and the bolt has a length of 32mm. The plate is 15x15x4mm and fits perfectly in any standard US Finbox. Made of high quality stainless steel 316, which provides excellent corrosion resistance to saltwater, making this bolt and nut a durable solution
Now also available in a convenient three-pack
through this convenient four pack you have benefits such as:

Easy Change of Fins: If you use multiple fins on different SUPs or for different conditions, three bolts and nuts allow you to change faster and easier without having to transfer your only set each time.

Support for Multiple Boards: If you have multiple SUPs, the three sets of bolts and nuts allow you to have each board ready to go. As a result, you are always prepared no matter which board you choose.

Redundancy and Safety: Having extra nuts and bolts on board gives you peace of mind. Should a part break or get damaged during your adventure, you'll have a replacement part on hand immediately without having to interrupt your session.