Abstract: A fastener used to attach adjacent, parallel boards to a transverse support structure such as in a deck, dock or similar structure. The fastener consists of two sides that are generally perpendicular to each other. One side is longer with respect to the other resulting in tabs extending out on opposite ends of the fastener. The short side of the fastener is attached to the underside of a board. The board is then turned upright and placed into position. One of the tabs is attached to the support structure. The other tab extends under, and is held down by, a previously installed board.