MIL-PRF-94/6E
3.4 Mounting and locking nuts. The mounting nut shall be 0.094 inches (2.388 mm) thick and measure 0.500
inches (12.70 mm) across the hexagonal flats. The locking nut shall be within the limits 0.151 inches (3.835 mm)and
0.234 inches (5.94 mm) thick and shall measure 0.500 inches (12.70 mm) across the hexagonal flats. The thread
size shall be 0.375-32 NEF-2B.
3.4.1 Internal tooth lockwasher. Internal tooth lockwasher of suitable size shall be applied.
3.4.2 Retainer rings. If retainer rings are used, they shall have a maximum thickness of 0.047 inches (1.194 mm).
3.5 Power rating. The maximum continuous power rating in watts with both entire resistor elements in the circuit
for the various resistance characteristic combinations are as specified in table IV.
TABLE IV. Maximum continuous power rating (watts).
Resistance characteristic combination
A
C
G
H
Panel
Rear
Panel
Rear
Panel
Rear
Panel
Rear
section
section
section
section
section
section
section
section
0.00
1.60
0.00
0.80
0.00
0.80
0.00
1.60
0.20
1.59
0.10
0.79
0.20
0.79
0.10
1.59
0.40
1.56
0.20
0.78
0.40
0.78
0.20
1.56
0.60
1.52
0.30
0.76
0.60
0.76
0.30
1.52
0.80
1.46
0.40
0.73
0.80
0.73
0.40
1.46
1.00
1.38
0.50
0.69
1.00
0.69
0.50
1.38
1.20
1.28
0.60
0.64
1.20
0.64
0.60
1.28
1.40
1.14
0.70
0.57
1.40
0.57
0.70
1.14
1.60
0.96
0.80
0.48
1.60
0.48
0.80
0.96
1.80
0.70
0.90
0.35
1.80
0.35
0.90
0.70
2.00
0.00
1.00
0.00
2.00
0.00
1.00
0.00
3.6 Torque.
3.6.1 Operating torque. The torque required to effect rotation shall be 1 ounce-inch minimum and 12 ounce-inch
maximum.
3.6.2 Stop torque. The torque applied to the operating shaft to the stops shall be 8 pound-inch.
3.6.3 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.
3.7 Total mechanical rotation. The total mechanical rotation with a switch shall be within the limits of 309 degrees
and 320 degrees.
3.8 Thermal cycling. The resistance shall not change in excess of 4 percent.
3.9 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.
6
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