FED-STD-H28/4 1978 Edition, March 31, 1978
SCREW THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 4, CONTROLLED RADIUS ROOD SCREW THREADS, UNJ SYMBOL
Includes all amendments and changes through Validation Notice 4, August 29, 2006
Additional Comments: ***SEE ALSO FED-STD-H28 SET***
This standard was approved by the Commissioner Federal Supply Service, General Services Administration, for the use of all Federal agencies.
This Federal Standard is in general agreement with the latest issue in effect of MIL-S-8879 Screw Threads, Controlled Radius Root with Minor Diameter; General Specification for, and is therefore authorized for the use of all Federal Agencies.