MIL-DTL-641F
TABLE IV. Jacks and mating plugs. Continued.
Jacks
Plugs
Part number
Type designation
Part number
Type designation
M641/19-9
JJ-805
M641/20-1
thru
N/A
M641/20-8
M641/13-1
PJ-711
thru
thru
PJ-778
N/A
M641/21-12
M642/13-4
M641/22-1
U-385/U
M642/14-1
U-384/U
1/ Types PJ-054B and PJ-054R can be replaced by types PJ-540B and PJ-540R, respectively.
The cord-entrance dimension for PJ-054B and PJ-054R is 0.250 inch, for PJ-540B and PJ-540R,
the cord-entrance dimension is 0.281 inch.
2/ Two JJ-086 are needed for use with PJ-327
4.6.3 Insulation resistance (see 3.6.2). Jacks shall be tested in accordance with method 302 of MIL-STD-202.
The following details shall apply:
a. Special preparation Use applicable test plug (see 3.1).
b. Points of measurement Between mutually insulated terminals of the jack before insertion of the plug, and
between normally closed local contacts after insertion of the plug.
c. Test condition letter A.
4.6.4 Dielectric withstanding voltage (see 3.6.3). Jacks shall be tested in accordance with method 301 of MIL-
STD-202. The following details shall apply:
a. Magnitude of test voltage and nature of potential 500 volts ac.
b. Duration of application For qualification inspection, the test voltage shall be applied at a rate of 100 volts
per second. For quality conformance inspection, the voltage may be applied instantaneously and shall be
maintained for at least 5 seconds.
c. Points of application Between mutually insulated terminals of the jack.
4.6.5 Insertion and withdrawal forces (see 3.6.4). The specified test plug (see 3.1) conforming to the applicable
figure (see figures 1 to 6, inclusive) shall be used. The maximum force required to insert and withdraw the plug
shall be measured as follows: The axis of the plug shall be aligned with the axis of the jack bushing. A straight
thrust shall then be applied gradually in a direction along the axis of the plug until it is completely inserted into the
jack; a straight pull shall then be applied gradually in a direction along the axis of the plug until it is completely
separated from the jack.
4.6.6 Thermal shock (see 3.6.5). Jacks shall be tested in accordance with method 107 of MIL-STD-202. The
following details and exception shall apply:
a. Special mounting The applicable mating plug (see table IV) shall be inserted into the jack and shall
remain inserted in the jack throughout the test.
b. Test condition letter A.
c. Examination after cycling Jacks shall be examined for cracking, warping, and delamination of the
insulation, and legibility of marking. Screw-on shells (where used) shall be removed and replaced without
the use of tools other than a screwdriver inserted in the slot in the end of the metal portion of the jack.
4.6.7 Moisture resistance (see 3.6.6). Jacks shall be tested in accordance with method 106 of MIL-STD-202.
The following details and exceptions shall apply:
a. Mounting Cord-mounting jacks shall be supported by wires connected in the normal manner to their
terminals; the wires shall conform to type MW of MIL-W-76 and shall be polyvinylchloride insulated. All
other jacks shall be mounted by normal mounting means, using brass hardware, on a vertical silver-plated
brass or stainless-steel panel, the panel shall be insulated from the test chamber by ceramic insulators, or
equal.
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