National Union of Metalworkers of South Africa (NUMSA)
- Corporate body
- 1987-
NUMSA was founded in 1987 as one of the largest affiliate of the Congress of South African Trade Unions (COSATU), and remains the biggest metal workers trade union. It was expelled from COSATU in 2014 and is now one of the biggest affiliate in the South African Federation of Trade Unions which was formed in 2017.