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|  MIL-F- 5a ( AR )
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3.11.14.11 Connect lox.- Soldering leads, lugs, and terminals
(solderless and sold er type) shall be made of copper and terminal
plates shall be made of copper or brass and shall be tinned
(lead-tin alley), silver -Plated, or lead-alloY coated Metal
components, such as screws and washers, in contact with current
carrying parts, shall be made of copper, brass, or bronze and
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shall be similarly finished. The use of cadmium plating shall
not be permitted on current carrying parts or on metal components
In contact with them. The use of fork type terminals Shall'not be
permitted unless specifically approved by the contracting officer.
Terminals shall not turn or become loose when the equipment is
subjected to service conditions. All electrical connections
shall be mechanically secure and electrically continuous. Wires
subject to breakage at the connections shall be provlded with
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terminals that grip the wire insulation. Textile Insulation
ends of wires shall be secured against fraying by mechanical
means, by application of varnish conforming to Specification
MIL V-173, or any other approved method.
3.11 .14.11.1 Terminals attached to parts. - Terminals attached
to parts shall be mechanically strong and shall not break when
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soldering and unsoldering connection thereto Terminals of
potted parts shall be designed and fastened to a terminal lnsu-
lating strip or plate in such a manner as not to cause any de-
gradation in the moisture excluding property of the enclosure
by normal soldering and resoldering of the external leads to
the terminals. Terminals shall be so spaced as to assure a
sufficiently high leakage resistance.
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3.11 .14.11.2 Replaceable assemblies. Connections to assemblies
that are intended to be replaceable e, such as terminal connections
to a terminal block assembly, shall not be soldered. Connections
of this nature shall be made with screws or by means of plug and
jack type connectors. Solder connections shall be used for small
replaceable assemblies employing miniature tubes and components.
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3.11.1$.12 Grounding. - Ground connections to complete electrical
circuits shall be made to the chassis or frame and not to shields
or other mechanical parts; however, IF transformers shall be ground-
ed through their ,cases if other means of grounding are impracti-
cable.
to chassis. - Ground connections to the
3.11.14 .12.1 G r o u n d i
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chassis or frame shal be made mechanically secure by soldering
to a spot-welded terminal lug or to a portion of the chassis or
frame that has been formed Into a soldering lug, or by use of a
terminal on the ground wire and securing the terminal by a
screw, flat washer, and lock washer; the screw shall either fit
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