Used on an air combat system, flyer's helmet
NSN 6320-01-512-2031
NSN 6685-01-049-7173
NSN 5920-00-362-1376
NSN 6105-01-406-1425
NSN 5975-01-456-4851
NSN 6220-01-172-0266
NSN 6650-00-569-1762
NSN 6105-01-479-8988
NSN 5965-01-613-3664
NSN 6240-01-392-1334
NSN 5960-01-469-5874
NSN 5895-00-070-5527