MIL-H-21040C, MILITARY SPECIFICATION: HONEYCOMB MATERIALS, WATER MIGRATION RESISTANT TYPE, STRUCTURAL, PAPER BASE (16 JUL 1974) [NO S/S DOCUMENT]

MIL-H-21040C, MILITARY SPECIFICATION: HONEYCOMB MATERIALS, WATER MIGRATION RESISTANT TYPE, STRUCTURAL, PAPER BASE (16 JUL 1974) [NO S/S DOCUMENT]., This specification covers fully cured, resin-treated, kraft paper, water migration resistant type honeycomb materials for structural applications