MIL-H-27856D (NOTICE 1), MILITARY SPECIFICATION,: HELMET, FLYING HGU-7/P (27 MAY 1988) [NO S/S DOCUMENT]

MIL-H-27856D (NOTICE 1), MILITARY SPECIFICATION,: HELMET, FLYING HGU-7/P (27 MAY 1988) [NO S/S DOCUMENT]., ML-H-27856 has been reviewed and determined to be valid for use in acquisition.