M8x30mm Stainless Steel Allen Head Bolt 

Murrays Part# 55-0016A

The M8 x 30mm Allen Head Hydrofoil Bolts are used on Slingshot, Liquid Force, Lift, could IX foils and many more.   It's always good to have an extra set on hand, in case you loose some.  This is your foil mast to mast collar connection bolt.  Made of corrosion resistant 316 stainless steel.