Extractor post type fuseholders are used to fully enclose electrical fuses and are designed for panel mounting. The fuseholders covered by this specification are unique due to the fact that these devices must be able to operate satisfactorily under the following demanding conditions: Vibration, 100 g's of shock, hours of salt spray, and thermal shock from −55°C to +85°C. In addition, these requirements are verified under a qualification system. Commercial components are not designed to withstand these environmental conditions.