MIL-B-121F (NOTICE 1), MILITARY SPECIFICATION: BARRIER MATERIAL, GREASEPROOFED, WATERPROOFED, FLEXIBLE (29 DEC 1997) [S/S BY MIL-PRF-121F]

MIL-B-121F (NOTICE 1), MILITARY SPECIFICATION: BARRIER MATERIAL, GREASEPROOFED, WATERPROOFED, FLEXIBLE (29 DEC 1997) [S/S BY MIL-PRF-121F]., MIL-B-121F is inactive for new design and is no longer used, except for replacement purposes.