ISO 8434-1:2007

ISO 8434-1:2007 specifies the general and dimensional requirements for 24� cone connectors using cutting ring and O‑ring seal cone (referred to as DKO) suitable for use with ferrous and non‑ferrous tubes with outside diameters from 4 mm to 42 mm inclusive. These connectors are for use in fluid power and general applications within the limits of pressure and temperature specified in ISO 8434-1:2007.
It also specifies a performance and qualification test for these connectors.