US Patent 9688365 Fin plug for water craft

A fin plug (10) for installation in a water craft, said fin plug (10) including: a first open cavity (20) adapted to receive a base portion (15) of a water craft fin (50); and, a resilient biasing rod (30) and a protruding member (35) cooperating with the biasing rod, said protruding member being adapted to abut the base portion (15) of said fin (50) when received in said first open cavity (20); wherein said biasing rod and protruding member are adapted to apply a force to the base portion of said fin to inhibit removal of said fin from said first open cavity.