MIL-PRF-94/5J
3.5.1 Internal tooth lockwasher. Internal tooth lockwasher of suitable size shall be applied.
3.5.2 Retainer rings. If retainer rings are used, they shall have a maximum thickness of 0.047 inches.
3.6 Power rating. The power rating shall be 2.0 watts for taper A resistors and 1.0 watts for taper C and F.
3.7 Torque.
3.7.1 Operating torque. The torque required to effect rotation shall be 1 ounce-inch minimum and 6 ounce-inch
maximum.
3.7.2 Stop torque. The torque applied to the operating shaft to the stops shall be 8 pound-inch.
3.7.3 Locking torque (as applicable). For the locking bushing type resistors, the locking nut shall be tightened with
a torque of 10 pound-inches. After the locking nut is tightened, the contact arm shall not move when a torque of 30
ounce-inches is applied to the shaft.
3.8 Total mechanical rotation. The total mechanical rotation with a switch shall be within the limits of 330 degrees
and 340 degrees; without a switch, within the limits of 309 degrees and 320 degrees.
3.9 Thermal cycling. The resistance shall not change in excess of 4 percent.
3.10 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin
content of resistor components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a
minimum of 3 percent lead, by mass (see 6.3).
4. VERIFICATION
4.1 Sampling and inspection. Sampling and inspection shall be in accordance with MIL-PRF-94.
4.2 Dielectric withstanding voltage. In the dielectric withstanding voltage test, the applied potential shall be 450
volts rms at reduced barometric pressure.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order
(see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel
need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point's packaging activity within the Military Service or Defense Agency, or within
the military services system commands. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting the responsible
packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. The intended use specified in MIL-PRF-94 is applicable to this specification.
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