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This replacement stainless steel Fin Bolt with Plate by saruSURF is compatible with most US fin boxes center. Tighten with your fingers, no need to use a screwdriver, adjust your fin position (forward, backward, take it off) anytime. Standard size M4-0.7 thread and length of 19mm. Plate measures 14mm x 14mm. Not suitable for Starboard boards – see here. Be sure to measure your fin bolt length and plate size for compatibility.

See our guide to installation and removal of US Box fin.