Public domain
Assembling the rod and caps to an engine crankshank, using a tension wrench. Picture shows a crankshaft and connecting rod assembly. Packard marine engine plant, Detroit
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineAssembling the rod and caps to an engine crankshank, using a tension wrench. Picture shows a crankshaft and connecting rod assembly. Packard marine engine plant, Detroit. 1941-01-01. United States. Office For Emergency Management, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.