MIL-STD-372, MILITARY STANDARD: WELDING, GAS METAL-ARC AND GAS TUNGSTEN-ARC, ALUMINUM ALLOYS, READILY WELDABLE FOR STRUCTURES, EXCLUDING ARMOR (01 SEP 1988) [SUPERSEDES MIL-W-45205B] [S/S BY TACOM Drawing 12472301]., This standard covers the welding of all aluminum alloys other than armor to armor or aerospace applications using the gas metal-arc or gas tungsten-arc welding process..Product Code:SAE ARP899 Title:Tube Fittings, Fluid Systems, Permanent Type, General Requirements For Issuing Committee:G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies Scope:This ARP establishes the basic test and design requirements for permanently attached tube fittings for use in aerospace fluid systems. Definitions of fitting and related terms are included in 6.3. This document recommends the tooling envelope, design criteria, and test requirements for tube fittings attached to tubing by methods which are usually considered to be permanent (brazing, welding, swaging, shrink fit, etc.).