Factory worker

A blue collar worker who typically works in a factory.

"The term ‘blue-collar workers' was first used in reference to the blue work shirts the factory workers often wore, and later extended to maintenance and construction workers and anyone else doing manual work."
(Murray, R. E., The Lexicon of Labor: More Than 500 Key Terms, Biographical Sketches, and Historical Insights Concerning Labor in America, New York: New Press, 1998)