MIL-DTL-83505B
4.6 Methods of inspection.
4.6.1 Test methods. The following identified tests and test methods assure socket integrity within typical operating conditions and
applications. Alternate commercial or industry standard test methods are allowed, however when and alternate method is used, the
qualifying activity must be notified prior to performance of the test. The test methods described herein are proven methods and shall
be the referee method in cases of dispute.
4.6.2 Visual and mechanical inspection. Sockets shall be examined to verify that the dimensions, materials, design construction,
marking, and workmanship are in accordance with the applicable requirements (see 3.1, 3.3, 3.4, 3.6, and 3.7).
4.6.3 Insertion force (see 3.5.1). The initial force required to fully insert the test gage and withdrawal the maximum diameter test
gage (see figure 3) shall be measured. The test restrictions are as follows:
a. The vertical axis of the test gage shall coincide with the vertical axis of the socket.
b. The test gage shall travel along the vertical axis of the socket.
c. The speed of insertion of the test gage into the socket contacts shall not exceed 2 inches (50.80 mm) per minute for
consistent-speed machines, or the rate of loading shall not exceed 80 pounds (36.29 kg) per minute for contact-rate-of-force
machines.
d. Scale mechanism shall have no dashpots or other damping devices.
e. Scales shall be calibrated in .125 pound (0.06 kg) steps or less, and shall be accurate to within ±5 percent.
4.6.4 Withdrawal force (see 3.5.2). After two withdrawals of the maximum diameter insertion and withdrawal force test gages (see
figure 5), the individual unmating force shall be measured using the minimum diameter test gage. The test gage shall be inserted to
the depth specified (see 3.1) and the withdrawal force of .5 ozf (14.17 gram) minimum shall be applied to the test gage. The test
restrictions are as follows:
a. The vertical axis of the test gage shall coincide with the vertical axis of the socket.
b. The test gage shall travel along the vertical axis of the socket.
c. The speed of insertion of the test gage into the socket contacts shall not exceed 2 inches (50.80 mm) per minute for
consistent-speed machines, or the rate of loading shall not exceed 80 pounds (36.29 kg) per minute for contact-rate-of-force
machines.
d. Scale mechanism shall have no dashpots or other damping devices.
e. Scales shall be calibrated in .125 pound (0.06 kg) steps or less, and shall be accurate to within ±5 percent.
4.6.5 Socket retention (type I through IV) (see 3.5.3). With the socket mounted in an appropriate fixture, a 7.5 pound (3.40 kg)
axial load shall be applied to terminals intended for solderless wrap applications. A 7.5-pound (3.40 kg) axial load shall be applied in
both directions to terminals intended for solder applications. There shall be no damage or loosening of the socket from the mounting
board.
4.6.5.1 Solderless spring contact pwb retention (type VI) (see 3.5.3.1). With a solderless spring contact mounted in a test pwb a
4-pound (1.81 kg) axial load shall be applied in both directions to the terminal (see 3.5.3.1).
4.6.6 Low-signal level contact resistance (see 3.5.4) (see figures 6 and 7). The low-signal level contact resistance test procedure
shall be in accordance with method 3002 of MIL-STD-1344. The following details shall apply:
a. All samples in the test group shall be measured.
b. Brass or copper base alloy gage.
c. Plating of the test gage and socket spring contact to be the same general materials.
d. Minimum size test gage shall be used (see figure 5).
e. Environmental conditioning not required.
f. One measurement in each direction, and then record the average of the two readings.
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