Shipping Container Fastener and Method

A fastener for fastening an ISO container to a ship, truck, trailer, another ISO container or other structure. In one embodiment an elongated nut is inserted into an elongated aperture of the ISO container's corner casting, and is rotated 90 degrees to be transverse to the longitudinal axis of the aperture. A threaded shaft is rotated, after being inserted in a slot of a plate mounted to the structure, causing the plate and elongated nut to be drawn closer to one another, thereby clamping the corner casting between the nut and the plate. In another embodiment an elongated nut is inserted into the elongated aperture and is rotated 90 degrees. A line extends from a winch mounted to the structure and is mounted to a loop at the opposite end from the nut. The winch tightens the strap, drawing the loop, nut and, thereby, the container against the structure.