MIL-T-8504B (NOTICE 2), MILITARY SPECIFICATION: TUBING, STEEL, CORROSION-RESISTANT (304), AEROSPACE VEHICLE HYDRAULIC SYSTEMS, ANNEALED, SEAMLESS AND WELDED (25 NOV 1998) [S/S BY SAE AMS 5567]., MIL-T-8504B remains inactive for new design; however, the document is valid foracquisition when needed.