FED-STD-H28/9, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES (SECTION 9) GAS CYLINDER VALVE OUTLET AND INLET THREADS (31 AUG 1978)
FED-STD-H28/9, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES (SECTION 9) GAS CYLINDER VALVE OUTLET AND INLET THREADS (31 AUG 1978)., This section provides the standards for special screw threads applicable to compressed gas cylinder valve connections.