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K4 Fins / US screw and plate
US nut and boltUS plate and screw
US nut and bolt
US plate and screw

US screw and plate


Note: All K4 Fins US fins come complete with a US ‘screw and plate’.

The screws are A4 stainless steel, the plates are a brass insert moulded into tough nylon. They are HALF the weight of the existing brass plate ones, which may not sound a lot but is a 20g saving in a quad. Add this to a set of K4 quad fins and there’s a saving of 0.2kg over a standard G10 set up – not insubstantial for the fins alone!

Strength-wise these are more than sufficient. A vice/lump hammer test showed the first failure was to shear the lugs off the back of the fin(!). Eventually with a good swing of the hammer the plate shattered destroying the brass insert along with it, but this was at a far greater load than you’d want to subject your board to even if you were hitting rocks.

I think we have a winner with these, and will be supplying them free of charge with our fins from now on.



US screw and plate.

Additional information

Pack Size

Pack of 5, Pack of 10


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