FED-STD-H28/2B, FEDERAL STANDARD: Screw-Thread Standards for Federal Services Section 2 Unified Inch Screw Threads- UN and UNR Thread Forms (20-AUG-1991)

FED-STD-H28/2B, FEDERAL STANDARD: Screw-Thread Standards for Federal Services Section 2 Unified Inch Screw Threads- UN and UNR Thread Forms (20-AUG-1991)., This section provides the standard for unified inch screw threads to be used by the Federal Services.