Our Ref No : 7935 £2.49 Availability: In Stock
This M4 Nut and Screw is intended for use with the U.S. Fin Box System in use with hundreds of manufacturers around the world.

The fin head is 9mm wide and will typically have a Roll Pin or Solid Pin of around 5mm Diameter and 14mm length running sideways through the head at the rear or the front, which is designed to engage with a concealed slot on either side of the fin box 9mm wide opening to take the head, usually accessed via a cut out of 15 to 16mm width in the centre of the box or the end.

The Brass T nut is slipped into the same slot, having pre engaged rear or front 5mm Dia pin.
The fin is secured by inserting the M4 Screw through the hole in the fin and engaging this with the thread in the T nut.

Simply tighten the screw to secure the fin (some fins need slight modification to fit boxes or different screws)
Fins Selector

The fin is a highly technical part!

Our products are continuously evolving, which keeps them at the forefront and means they are always gaining in precision.

At Select, our passion has remained intact and our commitment to obtaining the best fins is total !

Today, more than ever, our fins possess a faultless technological focus.

Fins are not fashion accessories: different colours, new shapes of no technical interest, and attractive serigraphy don't mean anything in terms of performance.

The selectors below have been designed to help you choose the correct fin length taking into account the following parameters:

" Your sailing program
" Volume and width of your board
" Sail surface area (m²)
" Your weight

The size of the fin is of major importance: your fin is your propeller... It transmits the energy captured by the sail and generates a push which propels your board forwards.

In order for the propulsion principle to work well, your sail / board / fins' suitability must be perfect !

According to this consideration, we've build a set of selectors, that will guide you choosing the right fin - Please copy and paste the link below into your browser OR highlight link and Right click/Open Link to access this - To return to this page, use Go Back One Page Arrow.


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