M24308 Datasheet, PDF (25/41 Pages) ITT Industries – DETAIL SPECIFICATION

MIL-DTL-24308G
w/AMENDMENT 2
4.5.26 Thermal vacuum outgassing (classes D, K, and M) (see 3.5.24). All nonmetallic materials, including
lubricants, used in the manufacture of these connectors shall be tested in accordance with JSC SP-R-0022 or
ASTM E595 to determine the maximum TML of the original specimen mass and the VCM content of the original
specimen mass. For the purpose of determining TML and VCM of connectors, the original specimen mass shall be
the assembled connector mass excluding metallic parts. The TMC and VCM for the connectors may be determined by
testing the specific materials of the connector and calculating the loss for the connector.
4.5.27 Resistance to solder heat (solderable, nonremovable contacts only) (see 3.5.25). Unmated connectors with
printed wiring board terminations shall be tested in accordance with method 210 of MIL-STD-202, condition C.
Unmated connectors with solder terminations shall be tested as follows:
a. Where applicable (not for printed circuit board type connectors) the appropriate copper wire size, 2 to 4
inches in length, properly prepared for the applicable solder cup size shall be inserted into the contact
termination. Seven contacts or twenty percent of the contacts, whichever is greater, shall be tested.
b. The test specimens shall be fluxed accordingly with flux liquid or other techniques (see 3.3.1).
c. The solder iron shall be heated to a temperature of 360°C ±10°C. It shall be applied to the termination for a
period necessary to hold the solder in a liquid state for 4 to 5 seconds. Solder type to be used is SN-63 in
accordance with J-STD-006.
d. After application, the soldering iron shall be removed and a visual and mechanical inspection performed. The
visual inspection shall be at 10X.
e. The connector shall show no evidence of distortion or damage to any area of the connector housing. The
contact shall meet the contact retention requirement (see 3.5.5).
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirement shall be as specified in the contract or order
(see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel
need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging
requirements are maintained by the Inventory Control Point's packaging activity within the Military Service or Defense
Agency, or within the military service's system commands. Packaging data retrieval is available from the managing
Military Department or Defense Agency's automated packaging files, CD-ROM products, or by contacting the
responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. These connectors are intended for general military use. Connector installations should be
designed to assure that connectors are mated within the limits specified in 3.4.5. The class and types of connectors
are intended for application as follows:
a. Classes G and N connectors are intended for use in applications where the operating temperature range
-55° to +125°C is experienced. Crimp contact connectors have the additional advantage of possessing
removable crimp-type contacts.
b. Class N connectors are intended for use in applications where the presence of residual magnetism must be
held to very low levels to avoid interference with nearby sensitive instrumentation.
c. Class H receptacles are intended for use in applications where atmospheric pressures must be contained by
the connectors across the wall or panels on which they are mounted. If air leakage requirements are critical,
a class H connector should be used.
d. Crimp contact connectors should have contacts present in all positions when the connector is installed.
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