This specification defines the requirements for a threaded rigid coupling assembly, which utilizes ferrule type machined tube end fittings, to join tubing and components in aircraft fuel, vent, and other systems. This coupling assembly is designed for use from -65 to 200 °F and at 125 psig operating pressure.

Classification

The coupling assemblies shall be of the following types:

a. Type I: without wrenching lugs

b. Type II: with wrenching lugs