FED-STD-H28/4 Complete Document History
Section 4, Controlled Radius Root Screw Threads, Unj Symbol, Screw-Thread Standards Fo

Complete Current Edition:
   BASE - SECTION 4, CONTROLLED RADIUS R - March 31, 1978
   VALIDATION NOTICE 2 - VALIDATION NOTICE 2 FOR BASE - Aug. 10, 1993
   VALIDATION NOTICE 3 - VALIDATION NOTICE 3 FOR BASE - Sept. 10, 2001
   VALIDATION NOTICE 4 - VALIDATION NOTICE 4 FOR BASE - Aug. 29, 2006
   VALIDATION NOTICE 5 - VALIDATION NOTICE 5 FOR BASE - Feb. 27, 2019

Obsolete Revision Information:
   VALIDATION NOTICE 1 - VALIDATION NOTICE 1 FOR BASE - Feb. 9, 1988