Historical
ISO 4144:1979
Stainless steel fittings threaded to ISO 7-1
Specifies requirements for fittings for threaded connections, used mainly for industrial purposes. Table 1 contains diagrams ot types of fittings and their symbols. Tabulates the fitting dimensions (tables 2 to 10) with nominal sizes from DN 6 up to and including DN 80 (thread designation 1/8 to 3).
International Organization for Standardization [iso]