MIL-T-8887, MILITARY SPECIFICATION, TUBING, STEEL, CORROSION-RESISTANT, HEAT-RESISTANT, STABILIZED, WELDED, THIN WALL (ASG) (1 JUN 1961)., This specification covers welded thin wall tubing of stabilized corrosion-and-heat-resistant steel in which the wall thickness is approximately 2 percent of the outside diameter (OD), or less.