FED-STD-H28/1B, FEDERAL STANDARD: FEDERAL STANDARD SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 1 NOMENCLATURE, DEFINITIONS AND LETTER SYMBOLS FOR SCREW THREADS (21-APR-2020)

FED-STD-H28/1B, FEDERAL STANDARD: FEDERAL STANDARD SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 1 NOMENCLATURE, DEFINITIONS AND LETTER SYMBOLS FOR SCREW THREADS (21-APR-2020)., This section was developed in order to provide screw thread nomenclature and symbols for the Federal Services. The present issue is a complete revision of FED-STD-H28/1A dated 28 August 1985.