a fastener for securing objects to a slat floor , having a self - centering and self - aligning capability . a first embodiment comprises a body formed of a durable material and having a top surface , a lower surface , at least one side surface , and a central hole extending between the top surface and the lower surface . a second embodiment comprises a body formed of a durable material and having a top surface , a lower surface , at least one side surface , and a central hole extending between the top surface and the lower surface , wherein the top surface of the body has a flat central surface and two sloping upper surfaces starting adjacent to the flat central surface and angling downward toward either end of the body , and a lower fastener component that is coaxial with the central hole .