Production. Airplane maufacture, general. Many sizes and types of rivets are necessary in the assembling of a modern warplane. There are all the various kinds in this lot of "pied" rivets which the salvage department of Douglas Aircraft Company at Long Beach, California, will reclaim for use. Most important of the many types of aircraft made at this plant are the B-17F ("Flying Fortress") heavy bomber, the A-20 ("Havoc") assault bomber and the C-47 heavy transport plane for the carrying of troops and cargo