BS 2C 4:1973

This standard BS 2C 4:1973 Specification for coupling dimensions for aero-engine refrigerant pressure replenishment connections is classified in these ICS categories:

• 49.100 Ground service and maintenance equipment

This British Standard specifies the basic dimensional requirements for connections on aircraft to ensure coupling to ground equipment supplying engine refrigerant under pressure.

Provision is made for two sizes of connection:

• ¾ inch — suitable for rates of flow up to 25 gallons (114 litres) per minute.
• 1½ inch — suitable for rates of flow up to 120 gallons (546 litres) per minute.