This Aerospace Recommended Practice (ARP) is intended to establish recommended installation torque value limits and test criteria for machined flared and flareless hose and tube end fitting connections. Assembly of bite-type MS21922 flareless sleeves is not included in this ARP (see MIL-F-18280).

This ARP is applicable to two types of connections and two basic material classifications.

Type I - Flared to mate with MS33656

Type II - Flareless to mate with MS33514

Material I - Steel, corrosion resistant steel, and titanium fittings

Material II - Aluminum fittings