FED-STD-H28/12, FEDERAL STANDARD: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 12 ACME THREADS (31-AUG-1988)., this section provides the standards for ACME screw threads

FED-STD-H28/12, FEDERAL STANDARD: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 12 ACME THREADS (31-AUG-1988)., this section provides the standards for ACME screw threads.