MIL-DTL-83413C
4.7.7.1 Contact resistance (see 3.5.6.1). Test connectors and test apparatus shall be used
(see 4.2 and 4.2.1). test points are between the back end of the plug and at a point on the panel 2.00 ±
.01 inches (51.8 ±.3 mm) from the axis of the receptacle. This test shall be repeated using the ISO 46 and
NATO STANAG 3632 plugs at minimum pin diameters.
4.7.7.2 Clamp connector resistance (see 3.5.6.2). The grounding clamp connector shall be attached to a
steel rod of .750 ± .010 inch (19.05 + .25 mm) diameter. A test wire conforming to
MIL-DTL-83420 shall be attached to the handle. Test current applied from the steel rod to the wire with
each contact point within .500 inch (12.70 mm) from the clamp connector.
4.7.7.3 Assembly resistance (see 3.5.6.3). Test current shall be applied at both ends of the assembly.
Assemblies with plugs shall be mated and the current applied on the test apparatus, while assemblies
with grounding clamp connectors shall have clamp connectors attached to steel rods of .750 ± .010 inch
(19.05 ± .25 mm) diameter and current shall be applied .500 ± .125 inch (12.70 ± 3.18 mm) from the haw
of the clamp.
4.7.8 Cable attachment (see 3.5.7). The clamp connector cable attachment provisions shall be tested
by applying a tensile force between the clamp connector and an attached cable using a standard tensile
testing machine. The test shall be made with a head speed of one inch per minute. With the same cable
attached the grounding clamp connector shall pass the clamp connector resistance requirement of
4.7.9 Clamp release force (clamp connector only) (see 3.5.8). Using a test setup as shown on
figure 1, the force required to free the rod in the grounding clamp connector shall be determined.
4.7.10 Clamping life (see 3.5.9). With an 18-inch length of cable attached to one handle of the
grounding clamp connector by normal attachment provisions, the clamp connector shall be clamped onto
a 0.750 inch (19.05 mm) nominal diameter drill rod which is securely held in a horizontal position.
Sufficient force shall be applied to the cable end to disengage the clamp connector from the rod
permitting the jaws to snap shut. This constitutes one cycle. The connector shall be subjected to 5,000
such cycles. The grounding clamp connector shall then successfully pass the clamp release force
4.7.11 Vibration (see 3.5.10). The test shall be performed in accordance with test procedure 28 of EIA-
364. The following conditions shall apply:
a. Test condition IV.
b. Test apparatus shall be used for receptacles (see 4.2.1).
c. After completion of the test, the detent action test of 4.7.2 and the contact
resistance test of 4.7.7.1 shall be performed.
4.7.12 Durability (see 3.5.11). The test shall be performed in accordance with test procedure 09 of EIA-
364. The following conditions shall apply:
a. Test preparation: Connectors shall be mated.
b. 5,000 cycles shall be completed.
c. After completion of the test, the detent action test of 4.7.2 and the contact
resistance test of 4.7.7.1 shall be performed.
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