National Association of Die Casting Workers explained

The National Association of Die Casting Workers (NADCW) was a labor union representing workers involved in casting metal in the United States and Canada.

The union was founded in 1934,^[1] largely on the initiative of Edward T. Cheyfitz, who became its national secretary.^[2] In 1937, it affiliated to the Congress of Industrial Organizations, at which time, it had about 4,750 members.^[3] In 1942, it became part of the International Union of Mine, Mill and Smelter Workers. By 1948, it had 20,000 members, at which time it transferred to the United Automobile Workers.^[4]

References

1. Book: Reynolds . Lloyd G. . Killingsworth . Charles C. . Trade Union Publications: The Official Journals, Convention Proceedings, and Constitutions of International Unions and Federations, 1850–1941 . 1944 . Johns Hopkins Press . Baltimore.
2. News: LABOR: Revolutionary Decision . 10 July 2022 . TIME . August 31, 1942.
3. Book: Annual Report of the Labour Organizations in Canada . 1939–1940 . Department of Labour of Canada . Ottawa . 27 June 2022.
4. News: UAW MAY ABSORB 20,000; Agreement Covers Die Casters Who Quit Left-Wing Union . The New York Times . August 5, 1948.