This Aerospace Recommended Practice (ARP) is intended to establish recommended installation torque value limits and test criterion for machined flared and flareless hose and tube end fitting connections.

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

1. Type I - Flared to mate with MS33656, Style E
2. Type II - Flareless to mate with MS33514, Style E
3. Material I - Steel, CRES, and titanium fittings
4. Material II - Aluminum fittings