All nuts are A4 316 grade stainless steel for maximum corrosion resistance.

Some examples of the places each size are used on Sharks.

M5 - Used on QR base plates

M5 Nyloc - Used on USP rudders

M6 - General rigging nut

M6 Nyloc - Used on USP centre steer system

M12 - Used on classic pins

Please contact us for advice.