The collection consists of 169 agreements, 1940-1992, between various local unions of the International Association of Machinists or the International Association of Machinists and Aerospace Workers and numerous manufacturing and transportation corporations, government facilities, labor unions, and other entities.

International Association of Machinists and Aerospace Workers, Local Lodge 733 (Wichita, Kan.) collection (1939-2005) consists of contracts, photographs, and 6 oral histories. These materials were compiled by members of Local Lodge 733 as part of their local history project. Based in Wichita, Kansas, Local Lodge 733 represented Machinists working at the Beech Aircraft Corporation.

Members of International Association of Machinists and Aerospace Workers, Local Lodge 1650 (Kansas City, Mo.) worked in the airline industry. The records of the local are comprised of ledger books, bylaws, contract agreements, and some reference materials, 1941-2002.