This specification covers tantalum, electrolytic (nonsolid electrolyte), fixed capacitors (polarized and nonpolarized), hermetically sealed (see 6.7) in metal cases (see 6.1). Capacitors covered by this specification have reliability established for failure rate levels (FRL) ranging from 2.0 (or 1.0) percent to 0.001 percent per 1,000 hours in accordance with MIL-STD-690. These FRL are established at a 60-percent confidence level and are maintained at a 10-percent producer's risk. A Part Per Million (ppm) quality system is used for assessing the average outgoing quality of ER capacitors supplied to this specification. Statistical Process Control (SPC) techniques are required in the manufacturing process to minimize variation in production of ER capacitors supplied to the requirements of this specification.