MIL-DTL-87174A, DETAIL SPECIFICATION: HELMET, FLYER'S HGU-55/P (30-OCT-1998) [SUPERSEDING MIL-H-87174]

MIL-DTL-87174A, DETAIL SPECIFICATION: HELMET, FLYER'S HGU-55/P (30-OCT-1998) [SUPERSEDING MIL-H-87174]., This specification covers the requirements for the HGU-55/P flyer's helmet.