The monolithic glass covered by this specification is intended for glazing installation for a specific part of an aircraft. It is normally applicable for the external thermal barrier component of a double-wall window or for laminating to produce shatter- or heat-resisting panels. A typical double-wall window would consist of a monolithic glass unit and a laminated glass unit separated by a dead air space.

Type I glass is commercial plate glass intended for normal use.

Type II glass is a special color-clear glass with high light transmission intended for use when high light transmission is mandatory.

Type III glass is a special heat-absorbing glass intended for use when the absorption of radiant energy is of primary importance and light transmission can be sacrificed.

Type IV glass is a special low-expansion glass intended for use when exceptionally good resistance to thermal shock is desired.

Type V glasses encompass the strongest glasses available designed for use where high strength and light weight are required.

When special monolithic plate glass of a type not covered herein is used for aircraft glazing, it is suggested that the test methods of this specification be applied with specific requirements being approved by the procuring activity and specified in applicable drawings, specifications, or procurement documents.