Hydrofoil Wing kite foil T Nuts M8 Stainless Track Nuts Hydrofoil Wing kite foil T Nuts M8 Stainless, also know as track nuts. Can be used for wingfoil boards and kitesurf foil boards.4 x stainless T Track Nuts High strength stainless bolts set these are stronger than the brass version but used at your own risk as can cause damage to board if your foil hits an object. T-nuts at Boardworx More Foiling Accessories Boardworx Youtube