MIL-DTL-25955A
3.6.19.2 Moisture resistance, hermetic. The requirements of 3.6.6 apply to class H connectors with the
exception that only the engaging face seal need be provided. The ungrommeted terminal end may be
suitably encased to exclude it from any tests necessary.
3.6.19.3 Durability, hermetic. The inserts required for test by 3.6.7b shall not apply to class H
connectors.
3.6.19.4 Contact retention, hermetic. 3.6.7.1 and 3.6 shall not apply to class H connectors.
3.6.19.5 Contact removal, hermetic. 3.6.8.1 shall not apply to class H connectors.
3.6.19.6 Air leakage, hermetic. Class H receptacles when tested in accordance with 4.6.19 and
subjected to a pressure differential of 14.7 psi across the connector shall exhibit an air leakage rate of not
more than .001 micron cubic foot per hour (1.5 X 108 cc/sec). The leakage rate specified shall apply only
through the connector and not through the flange and mounting surface sealing area.
3.6.19.7 Immersion, hermetic. 3.6.10 shall not apply to class H connectors.
3.6.19.8 Insert retention, hermetic. 3.6.14 shall not apply to class H connectors.
3.6.19.9 Crimp retention, hermetic. 3.6.15 shall not apply to class H connectors.
3.6.19.10 Arc resistance, hermetic. 3.6.16 shall not apply to class H connectors.
3.6.19.11 Dielectric strength, hermetic. 3.6.17 shall not apply to class H connectors.
3.6.19.12 Dimensional stability, hermetic. 3.6.18 shall not apply to class H connectors.
3.7 Details of components. A complete connector shall be delivered as follows. All parts such as
cable adapter and clamp assemblies and grommets shall be delivered assembled into the connector
unless specifically excepted in the purchase order.
3.7.1 Contact delivery. A connector as described by the PIN shall include suitable contacts to
complete the applicable insert arrangement plug at least 10 percent spare contacts with a minimum of
three spare contacts. The contacts shall be delivered with each connector as specified.
3.7.2 Special wrenches. A connector shipped to the government and packaged as a unit of one shall
include one wrench or tool as a part of the connector if any special tool is necessary for disassembly and
assembly of the cable adapter and clamp assembly. Any screws requiring tools other than a screwdriver
or crescent wrench shall be considered as requiring a special wrench. Any special tools shall be of
minimum practicable size and weight for normal service use.
3.8 Interchangeability. All complete connectors having the same PIN shall be interchangeable with
each other with respect to installation (physical) and performance (function) as specified herein.
3.9 Finish. All metal parts other than those specified herein shall be cadmium plated in accordance
with SAE-AMS-QQ-P-416, type II, class C, except that a preliminary plating of another metal is
permissible. The resultant finish shall be natural color and electrically conductive.
3.9.1 Contact finish. Contacting surfaces of contacts shall be gold over silver-plated.
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