MIL-PRF-22684F, PERFORMANCE SPECIFICATION, RESISTORS, FIXED, FILM (INSULATED) GENERAL SPECIFICATION FOR (13 FEB 2006)., This specification covers the general requirements for insulated, film, fixed resistors of 2- and 5-percent resistance tolerance. These resistors are capable of full-load operation at an ambient temperature of 70°C and have a resistance-temperature characteristic of +200 parts per million per degree Celsius (ppm/°C), (see 6.1).