Adhesives conforming to this specification are intended for use in the structural bonding of metal to metal parts of aircraft to produce high strength joints when cured under specified conditions. The adhesives are intended principally for use on clad aluminum alloys. Parts or assemblies requiring the use of adhesives covered by this specification should be designed with consideration for the heat and pressure required during the bonding operations. The maximum curing pressure specified in 3.3.2.2 is a necessary requirement for determining the suitability of an adhesive for general production use; however, shop facilities permitting higher pressures in accordance with the manufacturer's instructions may be used wherever practicable.

The adhesives covered by this specification are also suitable for bonding other constructions including wood, glass, phenolic, polyester and epoxy resin laminates to each other or in combination.

Designers are cautioned that shear strength values specified herein are based on tests performed with clad aluminum alloy. For use with other materials, strength values of the adhesive shall be further investigated.

Adhesives covered by this specification are not intended for use in bonding sandwich constructions unless they conform to MIL-A-25463.