MIL-DTL-26500G
4.6.2.1 Torque to couple/uncouple (no contacts) (see 3.6). With no contacts in the connectors,
measurements shall be made in accordance with 4.6.2.
4.6.3 Ground resistance (class G only) (see 3.7). Connectors shall be mounted by its normal mounting
means to a copper plate of .025 inch (0.635 mm) minimum thickness. With a plug properly mated to the
receptacle, a resistance measurement shall be made from a cable clamp screw on the plug to the copper
plate, using a milliohmmeter of the four-terminal type.
4.6.4 Maintenance aging (see 3.8). Prior to environmental tests, each contact shall be inserted,
removed, and reinserted using applicable insertion and removal tools. The same contacts shall be used
throughout the maintenance aging procedure and subsequent tests. The connector shall be mated and
unmated ten (10) times. Twenty percent of the contacts, but not less than three contacts in both plugs
and receptacles, shall be removed and inserted nine times using applicable insertion and removal tools.
Pairs of adjacent contacts and contacts adjacent to the shell shall be cycled, with the total number of
contacts cycled. This test shall provide accelerated maintenance aging of the contact, contact locking
mechanism, and sealing provisions prior to environmental testing.
4.6.5 Contact insertion/removal forces, except class H (see 3.9). The forces required to push the wired
contacts into their normal position within the insert and to remove them, using the applicable insertion or
removal tool, shall be measured. Unless otherwise specified, 20 percent but not less than three contacts
in both plugs and receptacles shall be measured. Measurements shall be taken on one contact at a time
with all other contact holes filled with wired contacts or contacts followed by sealing plugs.
4.6.6 Durability (see 3.10). The connector assemblies shall be subjected to 200 cycles of mating and
unmating for type T and 500 cycles for type B. The mating and unmating shall be accomplished so that
the plug and receptacle are completely separated during each cycle.
4.6.7 Thermal shock (see 3.11). Mated connectors shall be subjected to the thermal shock of
MIL-STD-202, method 107, test condition C, except steps 2 and 4 shall be 2 minutes maximum duration.
The temperatures of step 3 shall be +200°C +5°C, -0°C (392°F).
4.6.8 Dielectric withstanding voltage (see 3.12). Unmated connectors shall be tested in accordance
with test procedure EIA-364-20. Test voltages, as shown in table XI shall be applied between the closest
three pairs of adjacent contacts that were subjected to maintenance aging and between the shell, and
the three contacts closest to the shell that were subjected to maintenance aging (see 4.6.4). Mated
connectors (class K) shall be in accordance with applicable military standards.
4.6.8.1 Dielectric withstanding voltage (group B). Unmated connectors shall be tested in accordance
test procedure EIA-364-20. Test voltages, as shown in table XI shall be applied between all adjacent
contacts and between the shell and each contact closest to the shell. Simulated contacts may be used
and the minimum voltage time shall be 5 seconds.
TABLE XI. Test voltages (ac-rms).
Unmated
Altitude
Mated
(feet)
Style S
Style P
Sea level
1500
1500
1500
10,000
1250
1250
1250
30,000
750
700
1000
50,000
500
450
1000
70,000
350
275
1000
90,000
250
200
1000
110,000
250
200
1000
21
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business