Grade 5 titanium countersunk screws with large 15mm head. For use with Universal Studs on masts that use M7 or M8 hardware. T30 torx drive.
Most hydrofoils currently use either M6 or M8 screws to attach the mast to the board, these are 6mm and 8mm in diameter respectively. Armstrong's new Performance series masts use M7 screws. Then, there are two types of screws in each of these sizes...flat head (countersunk) or button head.
To measure the length of a flat head screw, measure the complete length, including the head. For a button head screw, measure the length from under the head only. Older Armstrong masts with the oval washer use button head M6 screws and require a specific type of wingscrew.
It is recommended that you measure the screws you are currently using prior to ordering. It is a good idea to check to make sure these screws are threaded all the way through the track nut when the mast is installed but are not hitting the bottom of the track boxes.
There really are no "standard" length screws because there are so many variations in equipment. Our wingscrews are designated as the size of screw they are designed to replace. The picture shown on the product page is the actual item listed.