ISO/TR 7470:1988

Valve outlets for gas cylinders — List of provisions which are either standardized or in use

Specifies details for types of threads and thread sizes. Tabulates nominal diameters from 9,73 mm up to and including 30 mm together with the corresponding pitches and designations, refers to the national standards of concern (table 1). Table 2 contains valve outlets for toxic gases; valve outlets for flammable gases are given in table 3. Table 4 gives valve outlets for oxidizing gases, and table 5 includes valve outlets for inert gases.