Värn 646, also known as Rivet Ksp IV, is a Swedish military bunker located in the southern part of Sweden. This structure was part of Sweden's extensive Cold War-era defense network, designed to protect the country during a potential conflict. The bunker's exact location near the coordinates 55.9382769,12.7804577 places it in a strategic position within Sweden's coastal defense system.
While specific details about its construction and armament remain limited in the available sources, it represents the broader network of fortifications that Sweden maintained during the Cold War period to ensure national security.