MIL-B-18F
3.7.9.3.1 Mounting. The external length of each wire lead shall be 6.5 inches
(165.1 mm) ±.5 inches (12.7 mm). The wire leads shall be color coded as follows:
Positive:
Red
Negative
Black
As specified (see 3.1)
Intermediate
The free end of each wire shall be bared for a distance of .5 inch (12.6 mm) ±.125 inch (3.18 mm). The strands of each
lead, so bared, shall be twisted together and soldered, and then covered with an adherent insulating waterproof
material, or an equivalent method shall be used to prevent short circuits during storage and handling.
3.7.9.4 Snap-on. Snap-on terminals shall consist of two parts: Stud (nonresilient member) for the positive
terminal, and socket (resilient member) for the negative terminal, as shown on figure 2.
3.7.9.4.1 Mounting. Each member shall be securely mounted. Mating member engagements and
disengagements shall be made without dislocating the terminals or distorting the battery beyond the specified limits
during or after any tests performed on the battery (see 3.1). Each member shall be mounted so that the battery jacket
does not interfere with the proper mating of the terminals.
3.7.9.4.2 Contact resistance. The contact resistance between the stud and socket, when tested in accordance
with 4.7.4, shall not exceed 0.005 ohm.
3.7.9.5 Socket. Socket terminals shall be as specified (see 3.1). When the following types of socket terminals are
specified, they shall be as shown on figure 3, as applicable:
Type
No. of holes
I
2
IV
2
3
VIII
4
XIII
5
IX
8
A
B
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Contact components of socket terminals shall be made of phosphor bronze, beryllium copper, or plated spring brass.
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 material shall
be of plastic. The pinhole-spacing tolerances shall be ±.005 inch (0.127 mm). When used, socket domes shall be
made of sheet zinc .018 inch (0.0007 mm) thick (No. 9 gauge), or mechanical equivalent (see 3.1).
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