MIL-T-8504B, MILITARY SPECIFICATION: TUBING, STEEL, CORROSION-RESISTANT (304), AEROSPACE VEHICLE HYDRAULIC SYSTEMS, ANNEALED, SEAMLESS AND WELDED (25 JUL 1991) [S/S BY SAE AMS 5567]., This specification covers requirements for special-quality, seamless and welded corrosion-resistant steel tubing in the annealed condition (see 6.1).