Production. B-17F heavy bomber. Machine screws to be used in building new B-17F (Flying Fortress) bombers in the Boeing plant in Seattle are attached to hangers which suspend them in anodizing tank. In the tanks they will receive a protective plating to prevent corrosion. The Flying Fortress, a four-engine heavy bomber capable of flying at high altitudes, has performed with great credit in the South Pacific, over Germany and elsewhere. Sourced from the Library of Congress.
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