MIL-DTL-642E
concrete floor or rigid metal surface. The load shall be applied perpendicular to the longitudinal axis of the
plug through a rigid bar 0.50 ± 0.25 wide placed tangent to the shell surface and parallel to the floor or
surface supporting the plug.
4.6.15 Stack assembly strength (see 3.6.14). With the frame of the plug in the horizontal position the plug
shall be subjected to a static load of eight pounds minimum, on the number one contact, for a minimum
period of 24 hours.
4.6.16 Controlled drop (see 3.6.15). With the frame of the plug in the horizontal position each contact
shall be subjected to the impact of a 0.5 ounce (min) brass weight dropped from a vertical distance of 6
feet minimum. The weight shall be dropped through a tube 6 feet (min) long having an internal diameter
of 7/16 ±1/16 inch. Each contact shall be subjected to three consecutive blows with the plug being
rotated 120º ±10º between each blow.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements 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 packaging
requirements. Packaging requirements are maintained by the Inventory Control Point's packaging
activities 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's 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 which may be helpful, but is not
mandatory.)
6.1 Intended use. The telephone plugs covered by this specification are primarily for use in ground
support and shipboard communications equipment. Those connectors which form an integral part of a
headset and do not encounter a high vibration environment may be used for aerospace applications.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification.
b. Title, number, and date of the applicable specification sheet, and the complete PIN (see 3.1).
c. Packaging requirements (see 5.1).
6.3 Definitions. See MIL-STD-1353, "Electrical connectors and hardware."
6.4 Qualification. With respect to products requiring qualification, awards will be made only for products
which are, at the time of award of contract, qualified for inclusion in Qualified Products List QPL No. 642
whether or not such products have actually been so listed by that date. The attention of the contractors is
called to these requirements, and manufacturers are urged to arrange to have the products that they
propose to offer to the Federal Government tested for qualification in order that they may be eligible to be
awarded contracts or orders for the products covered by this specification. Information pertaining to
qualification of products may be obtained from DLA Land and Maritime, Attn: VQP, P.O. Box 3990,
Columbus, OH 43218-3990, email: vqp.cr@dla.mil. An online listing of products qualified to this
specification may be found in the Qualified Products Database (QPD) at https://assist.daps.dla.mil.
6.5 Mating jacks. Information on mating jacks is shown in table IV. All plugs listed in the same block of
column 1 are applicable for mating with all jacks listed in the corresponding block of column 2.
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