Switches covered by this specification are intended for use in low power dc applications. Also, these switches are intended for use on printed circuit boards, and leads may be soldered or inserted in plug-in sockets. When switches and plug-in sockets are used together, they should have similar or compatible contact finishes. These switches military unique due to the fact that these devices must be able to operate satisfactorily in military systems under the following demanding conditions: 15 gs of vibration, up to 500 gs of shock. In addition these military requirements are verified under a qualification system. Commercial components are not designed to withstand these military environmental conditions.