FED-STD-H28/7A, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 7 PIPE THREADS, GENERAL PURPOSE (25 OCT 1984)
FED-STD-H28/7A, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 7 PIPE THREADS, GENERAL PURPOSE (25 OCT 1984).