This invention relates to an apparatus for moving a plurality of two-piece canning jar-type lids in series to a feed mechanism in the form of a magazine which will single-line the caps and maintain them in assembled position. The single-lining mechanism is designed to feed lids into the path of movement of a plurality of containers, also moving in series on their sides with their axes horizontal. The caps or lids are carried at an angle to the path of movement of the finish of the jars such as that the finish of the jars or containers will each individually remove a cap from the supply of caps. The caps are then retained on the finish of the jar and are moved with the jar, in a linear path, with the caps being rotated by frictional engagement and thereby threaded onto the finish of the containers.