Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

This is an example of a Type H-4 protective flying helmet issued to United States Naval and Marine aviators in the mid-1950s. The Type H-4 was a refined update of the Type H-3 with a different shape in the design of the reinforcing ridges and the addition of a cloth inner liner with earphones.

Collection Item Long Description:

Data Source

National Air and Space Museum


Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum

Credit Line

Donated by Mr. Harold Mull


  • HAZMAT: Cadmium
  • Helmet Lining: Nylon
  • Webbing: Nylon and Cow Hide
  • Earphones: Rubber
  • Earphone Padding: Chamois
  • Other: Brass, steel, cadmium plating, plastic, cotton, foam


3-D (On storage mount): 21.6 × 17.8 × 30.5cm (8 1/2 × 7 × 1 ft.)

Country of Origin

United States of America

Physical Description

Olive drab fabric helmet lining for a United States Navy Type H-4 Protective Flying Helmet; nylon inner soft helmet with three panel construction; green nylon tapes reinforcing seams; black rubber P/O H-87A/U reciever headphones with green chamois ear padding; brown cow hide buckle chin strap; brown cow hide reinforcing with two snaps for oxygen mask; green nylon adjusting strap on back nape of nylon helmet; blue nylon manufacturer's tag with gold embroidered text (see inscriptions for full text) sewn on inside nape of nylon helmet



Inventory Number