United Electrical, Radio & Machine Workers of America, Unity Lodge, Local 251

United Electrical, Radio & Machine Workers of America, Unity Lodge, Local 251, represented workers at the Pratt & Whitney Division of Niles-Bement-Pond in West Hartford, Connecticut . Its predecessor union was established in 1933-1934 as the Machine Tool and Co-workers of America, Unity Lodge. In March 1937 the Unity Lodge affiliated with the United Automobile Workers of America to become UAW Local 348.

The charter for Local 251 was established on October 3, 1938 . Local 251 became part of the Amalgamated Local 405 of the International Union of United Automobile, Aircraft and Agricultural Implement Workers of America on March 19, 1948 .

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