MIL-V-22052D, MILITARY SPECIFICATION: VALVE, STOP AND STOP CHECK, GLOBE, ANGLE, AND Y PATTERN, CAST OR FORGED CARBON OR ALLOY STEEL, OUTSIDE SCREW AND YOKE (SIZES 2-1/2 INCHES AND LARGER) (20 MAR 1978)., This specification covers steel globe, angle, and Y pattern valves in sizes 2-1/2 inches and larger.