Abstract: A combination leash attachment and lock for surfboard includes a generally cylindrical plug receptacle having an outwardly extending annular lip and cylindrical end portions is received within a cylindrical aperture within a surfboard foam core. An assembly process shows the fabrication of a surfboard in a manner securing the plug receptacle within the foam core. Following the fiberglassing step of surfboard fabrication, the extending end portions of the plug receptacle are removed by sanding, grinding or other suitable processes. The plug receptacle defines an interior recess which receives a generally cylindrical leash plug to which an ankle leash may be secured and extend from the upper surface of the surfboard. With the leash plug removed, the plug receptacle provides a convenient passage through the surfboard which may be used to carry a locking mechanism or other security apparatus to prevent theft of the surfboard.

Abstract: A structure for mounting fins to the under side of a surfboard includes an elongated molded fin socket member which defines an interior rectangular slot configured to receive a rectangular base of a fin member. The fin socket further defines an upwardly extending cover recess coextensive with the slot. The fin socket is adhesively secured within a contoured recess within the surfboard foam core prior to the laminating operation. After the surfboard has been laminated with the fin socket in place such that the laminating materials overlap the fin socket, the upwardly extending portion of the fin socket is removed and ground flush to the laminated surface of the surfboard to expose the rectangular slot. Thereafter, the fin is adhesively secured within the slot.