MS-28783 Complete Document History
Ring, Gasket, Back-up, PTFE

Complete Current Edition:
   REVISION F - RING, GASKET, BACK-UP, PTFE - Jan. 25, 2006
   REV F VALIDATION 1 - VALIDATION NOTICE 1 FOR REVISION F - Dec. 2, 2010
   REV F VALIDATION 2 - VALIDATION NOTICE 2 FOR REVISION F - Aug. 14, 2020

Obsolete Revision Information:
   REV E INACTIVATION 2 - INACTIVATION NOTICE 2, REV E - July 18, 1997
   REV E VALIDATION 1 - VALIDATION NOTICE 1, REV E - Sept. 8, 1986
   REVISION E - RING, GASKET, BACK-UP, TEFLON - Jan. 1, 1960