FED-STD-H28/1A, FEDERAL STANDARD: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 1, NOMENCLATURE, DEFINITIONS AND LETTER SYMBOLS FOR SCREW THREADS (28-AUG-1985)

FED-STD-H28/1A, FEDERAL STANDARD: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 1, NOMENCLATURE, DEFINITIONS AND LETTER SYMBOLS FOR SCREW THREADS (28-AUG-1985)., This section was developed in order to provide screw thread nomenclature and symbols for the Federal Services. The document is a complete revision of FED-STD-H258/1, dated 31 March 1978.