The Federation of South African Trade Unions (FOSATU) was a trade union federation formed at a congress over the weekend of 14–15 April 1979 in Hammanskraal and officially launched five days later on 20 April. Its roots lay in the unions which had emerged from the spontaneous 1973 strike wave by black workers in Durban and Pinetown (part of the "Durban Moment").
FOSATU's constitution enshrined the principles of workers' control of their trade unions, non-racialism, worker independence from party politics, international worker solidarity and trade union unity. It strove to build a tight national federation to work towards an industrial workers' bloc firmly based in strong grassroots organisation on the factory floor. It became the first truly national non-racial trade union federation in South African history, building unity and avoiding the regionalism which had pervaded earlier attempts at such an organisation. Its success here has been attributed to the fostering of a national leadership layer of "organic intellectuals" through a strong focus on the political education of shop stewards, and tight integration of the national, provincial and local structures of the organisation.
As part of its commitment to trade union unity, FOSATU was prepared to disband its structures if wider unity could be attained. On 1 December 1985, following four years of unity talks between competing trade union federations, FOSATU upheld this pledge by dissolving into the newly formed Congress of South African Trade Unions (COSATU).