Decking stop device

A stop device for holding a unit load device in place on decking is described. In one example, the stop device includes a cylindrical socket having an outer surface, an inner surface, an open end, and a closed end. The stop device also includes a circular brim extending out from the outer surface, substantially perpendicular to the outer surface of the cylindrical socket, and a handle rod assembly that extends from the closed end of the cylindrical socket. The handle rod assembly can be used to lower the cylindrical socket into an aperture in the decking, such as aperture for a caster wheel in the decking. The handle rod assembly can also be used to rotate the stop device, aligning a circular segment cutout of the circular brim with an edge of the unit load device, to lock the stop device in place below the edge of the unit load device.