Christiania Spigerverk is a steel company which was founded in Oslo in 1853, and developed into one of the largest industrial companies in Norway. In 1972 Christiania Spigerverk combined with Elkem, to become . It was sold to Norsk Jernverk in 1985, and again split out as a separate company in 1993. In 1929 Christiania Spigerverk demerged its nail and screw production into the subsidiary Forenede Nagle- og Skruefabriker, which also incorporated the competing enterprises Den Norske Naglefabrik and Kampens Skrue- og Møtrikfabrik. The production was still located in Nydalen.