Abstract: A garage door operator is disclosed which has a motor-driven screw nearly enclosed within a guide, and a partial nut is guided by this guide means and moved longitudinally therealong by engagement with the rotating screw. The partial nut is adapted to be connected to a garage door to open and close the same. In order to shorten the package in which the garage door opener is shipped, the screw and guide means are in two or more parts and adapted to be coupled together to make an operative long screw and an operative long guide means. The screw parts, instead of being connected together at the factory by a double pivot connection, are shipped to the customer in a disconnected condition but one in which the coupling readily may be connected in a proper phase to avoid mismatch of the threads.