The FCS replacement stainless steel surfboard fin screws are for standard FCS fin plugs and are useful to have around for the time when you have a man down. Don't delay a surf session or miss flawless conditions just because you've lost a fin screw! FCS Stainless Steel Screws Note: DO NOT put FCS Screws in Future Fins Boxes! FCS and Futures Fin screws are threaded differently and you WILL strip your fin boxes if you don't use the correct screws! Click hereto for the Future Fins Screw page.