ISO 18082:2014 specifies the dimensions, the allocation and marking of non-interchangeable screw-threaded (NIST) connectors intended to be used at operating pressures up to 1 400 kPa, and for vacuum systems at pressures not greater than 60 kPa absolute.

ISO 18082:2014 specifies NIST connectors intended for use with the following medical gases:

• oxygen;
• nitrous oxide;
• medical air;
• helium;
• carbon dioxide;
• xenon;
• specified mixtures of the gases listed above;
• oxygen-enriched air;
• air for driving surgical tools;
• nitrogen for driving surgical tools;
• use with vacuum.