MIL-DTL-3786/41A
REQUIREMENTS:
Dimensions and configurations: See figures 1 and 2. Angle "A" is 15° for switches of 30°, 45°, and 60°
angle of throw; 18° for switches of 36° angle of throw.
Angle of throw and number of poles per deck: See table IV.
Insulation material: Symbol P.
Construction style: See table IV.
Temperature-life characteristics: See table V.
Number of positions: See table V.
Vibration grade: Symbol 3 (10 to 2,000 Hz).
Shock type:
Symbol H (high impact) and
Symbol M (medium impact).
Altitude: Symbol C (70,000 ft).
Number of decks: See tables VI and VII.
Mounting hardware: Each switch shall be provided with two hexagon nuts, unless otherwise specified,
0.312 ± 0.010 inch across flats and 0.078 ±0.010-inch thick; one internal tooth lockwasher .415
maximum OD.
Terminals: Terminals shall be designed so that the terminals can accommodate a wire having a
diameter of 0.030 inch. The terminals shall project in a direction parallel to the place of the switch
section.
Moisture resistance: After conclusion of test, insulation resistance shall be:
While switches are in humidity chamber - greater than 0.5 megohm. At the end of drying period - Not
less than 10 megohms.
Stop strength: 10 pound-inches maximum.
Rotational torque: The minimum and maximum values of torque determined for shaft rotation shall be
within the limits specified in table I.
Terminal strength (pull): A force of 2 pounds minimum shall be applied to the terminals.
TABLE I. Rotation-torque limits.
Torque (lb.-in)
Temperature
Total number of
switch poles
Minimum
Maximum
Less than 4
Room
.32
1.7
Minimum
.32
2.2
4 thru 8
Room
.4
2.7
Minimum
.4
3.2
More than 8
Room
.5
3.5
Minimum
.5
4.0
5