FED-STD-H28/12A, FEDERAL STANDARD: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 12 ACME THREADS (20-SEP-1989)
FED-STD-H28/12A, FEDERAL STANDARD: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 12 ACME THREADS (20-SEP-1989)., this section provides the standards for ACME screw threads.