The National Union of Blastfurnacemen, Ore Miners, Coke Workers and Kindred Trades (NUB) was a trade union in the United Kingdom. Prior to the formation of the union, blastfurnacemen had been represented by the Amalgamated Malleable Ironworkers of Great Britain, but this organisation concerned itself primarily with the puddlers. In response, the Cleveland-based blastfurnacement split away to form the "Cleveland Blastfurnacemen's Association" in 1878, followed in 1887 by a split in Cumberland. These two unions merged the following year to form the first National Association of Blastfurnacemen, which rapidly spread across the country.