FED-STD-H28/9A, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES (SECTION 9) GAS CYLINDER VALVE OUTLET AND INLET THREADS (24 MAR 1989)
FED-STD-H28/9A, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES (SECTION 9) GAS CYLINDER VALVE OUTLET AND INLET THREADS (24 MAR 1989)., This section provides the standards for special screw threads applicable to compressed gas cylinder valve connections.