MIL-B-49030A
3.5.8.5 Socket. Socket terminals shall be as specified in 3.1. When the following types are specified, they shall be
as shown on figure 3, as applicable.
Type
Number of holes
I
2
IV
2
VIII
3
XIII
4
IX
5
A
8
B
8
Contact components of socket terminals shall be made of phosphor bronze, beryllium copper, plated spring brass or
other approved metal (see 3.1). Sockets shall be so designed and constructed that there shall not be contact of any
of the pins of the mating plug to any socket terminal other than those for which such pins are intended without using
undue force. Insulating materials shall be of plastic. The pinhole spacing tolerances shall be ±.005 inch (0.13 mm).
3.5.8.5.1 Mounting. The socket shall be so supported and mounted that the top surface of the socket shall not
protrude above the adjacent surface of the jacket and shall be not more than .062 inch (1.57 mm) below the surface
of the jacket or socket dome, when used, initially, during, and after subsequent insertions of the mating plug. The
socket pin-circle center shall be located as specified, and the jacket opening shall be positioned so that its center is
within .094 inch (2.39 mm) diameter circle whose center coincides with the socket pin-circle center, initially, during,
and after insertions of the mating plug. The angular orientation of the socket shall be within 5° of the battery
centerlines or other lines of orientation as specified. Socket well depth, when measured from the top surface of the
jacket or socket dome, shall be as specified (see 3.1).
3.5.8.5.2 Contact resistance. Contact resistance between each socket insert and the applicable pin of the mating-
plug when tested in accordance with 4.7.4.2.1 shall not exceed .005 ohm.
3.5.8.6 Flat surface. Flat surface terminals shall be a flat plate of nickel plated steel or other approved metal, the
center of which may be level, have a raised or a recessed portion, or a punched or drilled hole, as specified. When
one terminal is the bottom of the can housing the battery, it shall be smooth and not injured as a result of cleaning or
polishing. When the positive terminal is the raised center portion of a flat plate, it may be provided with a centered
outward projecting point not to exceed .200 inch (5.08 mm) (see 3.1).
3.5.8.7 Coil and flat spring. Coil and flat spring terminals shall be made of beryllium copper, spring brass,
phosphor bronze, or other approved metal, and shall be as specified (see 3.1).
3.5.8.8 Protection of terminals. When flash-dip microcrystalline wax or equal is used to waterproof the jacket, the
terminals shall be covered with a removable tape or cap. Markings shall be legible after removal of the tape or cap.
The wax dip shall be applied after the application of the tape or cap.
3.5.9 Strap handle. Strap handle shall be of webbing, using natural or synthetic fiber, or of plastic material. The
width of the strap shall be .438 inch (11.13 mm) minimum. The effective length of the strap shall be at least one inch
longer than the distance between its anchorage. The strap shall withstand the test specified in 4.7.5 without breaking
or separating from its anchorages.
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