MIL-STD-609A (NOTICE-1), MILITARY STANDARD: RESPIRATORS, AIR FILTERING (10-APR-1990) [S/S BY MIL-R-17729 & A-A-1633]

MIL-STD-609A (NOTICE-1), MILITARY STANDARD: RESPIRATORS, AIR FILTERING (10-APR-1990) [S/S BY MIL-R-17729 & A-A-1633]., MIL-STD-609A dated 10 October 1968, is hereby canceled. Future acquisitions should refer to MIL-R-17729C, “Respirator Outfi~ Supplied Air, Two Man” and A-A-1633, “Respirator, Air Filtering, Dust and Mist”.