This standard specifies bronze 5K flange cocks (hereinafter referred to as cocks) used in ships' fresh water and water supply piping systems, fuel oil and lubricating oil piping systems, etc.
JIS F 7381:1996 history
2017JIS F 7370:2017 Ships and marine technology -- Bronze cocks for ships
2010JIS F 7381:2010 Ships and marine technology -- Bronze 5K flanged cocks