MIL-PRF-22E
3.4.5 Terminals. Terminals shall be located as shown in the associated specifications, (see 3.1 and 6.2). The
resistors shall be supplied either with soldering or screw terminals, as specified (see 3.1). Terminals shall permit
secure electrical and mechanical connection of wire to carry adequately the maximum current of resistors (see 3.1).
The terminals shall be treated to facilitate soldering.
3.4.5.1 Electrical off position (when applicable). The construction of the electrical off position shall be such that
there will be no question as to when the contact is turned from the winding. There shall be no provision for a terminal
at the off position. The number of terminals shall be as specified (see 3.1).
3.4.6.1 Locking bushing. Locking bushings for applicable styles shall be as specified (see 3.1).
3.4.6.2 Nonturn device. A nonturn device shall be furnished on standard bushing and locking bushing type
resistors which will prevent rotation of resistors with respect to the surface on which they are mounted. The location
of the nonturn device and its widest dimension shall be as specified (see 3.1). If the nonturn device is not
symmetrical about its vertical axis, it shall be so placed that a plane raised perpendicular to the widest dimension and
through its center will pass through the axis of the operating shaft.
3.4.7 Mechanical rotation. The total mechanical rotation shall be as specified (see 3.1).
3.4.8 Enclosure. When specified (see 3.1), resistors shall have enclosures for protection against mechanical
damage and shall be dustproof.
3.4.9 Hardware (for bushing mounted units). When specified (see 3.1), each resistor shall be furnished with a
corrosion resistant, internal tooth lock washer and a hexagonal mounting nut (see 3.12). Unless otherwise specified,
the hardware shall be assembled on the resistor.
3.4.9.1 Threaded parts. All external threaded parts shall be in accordance with FED-STD-H28, and as specified
herein.
3.4.9.2 Locking of screw thread assemblies. All screw thread assemblies shall be rendered resistant to loosening
under vibration.
3.5 Dielectric withstanding voltage. When resistors are tested as specified in 4.7.2, there shall be no damage,
arcing, or breakdown.
3.6 DC resistance (see 4.7.3).
3.6.1 Total.
3.6.1.1 Total resistance. When measured are tested as specified in 4.7.3.1, as applicable, the total resistance
value shall be within the specified nominal resistance tolerance for the nominal resistance.
3.6.2 Minimum resistance. When measured as specified in 4.7.3.2, the minimum resistance shall not exceed 0.2
percent of the nominal total resistance value or 0.2 ohms, whichever is greater, unless otherwise specified (see 3.1).
3.6.3 Resistance value deviations. All maximum deviations as specified in this section are to be considered
absolute limits with the exception of the contact resistance adjustment.
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