Nautix Fin Screw and Nut for US box fin - M4 20mm screw

Prolimit Fin Screw and Nut for US box fin A replacement Screw and Nut for most US box fins that have flat upper surface and require a 4mm screw.Brass M4 Nut.  Slot head slightly domed Stainless...

Select Hydrofoils Fin Screw and Nut for US Box fin which are counter-bored to 7mm Dia to give a flush screw fit, or which have a flat surface which leave the head in the water flow.  A...

Windsurfing Fin Screw with Washers If you have lost your fin screw replace it with a posi pan M6 screw (or slot screw in 100mm) with a metal washer and a rubber washer. Please check that you have...

replacement centre fin for a sup with integral screw. Base Length 16cm Fin height 20cm

Urethane Washer for Fin Screw  Made for M6 screws with an 5.7m I.D. to grip the screw x 18mm OD x 3mm thick for Fin/Foil Screws.High Quality Urethane washer with large outside diameter to suit...

Drake Shark Fin US box size: 23cm Built in glass rather than polyester, it’s a touch heavier than the 23” Race fin but definitely more durable.