These capacitors are intended for use in any equipment that are primarily designed as a substitute for mica-dielectric capacitors as a step toward conservation of critical mica. They are effective substitutes for mica-dielectric capacitors and can be employed for many applications where mica-dielectric capacitors are used, provided consideration is given to the differences in temperature coefficient and dielectric loss. Capacitors covered by this specification are military unique and are able to operate satisfactorily in military systems under the following demanding environmental conditions: shock, vibration, acceleration, extreme moisture, vacuum, and high operating temperatures.