FED-STD-H28/21B, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES - SECTION 21 - METRIC SCREW THREADS (29-DEC-1984)

FED-STD-H28/21B, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES - SECTION 21 - METRIC SCREW THREADS (29-DEC-1984)., The metric screw standards described herein constitute the basic standards to be used by the Federal Services. This document contains general standards for 60 degree, symmetrical threads - the M profile and the MJ profile.