MIL-T-8973 (NOTICE 1), MILITARY SPECIFICATION: TUBING, STEEL, CORROSION AND HEAT RESISTANT, FOR AEROSPACE VEHICLE HYDRAULIC SYSTEMS ASSEMBLED BY BRAZING (08 FEB 1993) [S/S BY SAE-AMS5897]., MIL-T-8973 dated 12 September 1969 has been reviewed and determined to be valid for use inacquisition.