MIL-DTL-12883F
3.3.4.1 Contacts and contact tabs. Unless otherwise specified, contacts and contact tabs shall be made
from beryllium copper in accordance with ASTM B194.
3.3.4.1.1 Finish. Contacts and contact tabs shall be gold plated in accordance with ASTM-B488, type II,
code C, class 1.27 (50 microinches) minimum over a suitable underplate except silver underplate shall not
be used (see 6.2).
3.3.5 Accessories (metal saddles, strap nuts, and center shields). Unless otherwise specified (see 3.1),
metal saddles, strap nuts, and center shields shall be brass, or be fabricated from a material with equal or
better properties to ASTM B36/36M, and shall be tin-lead plated (electrodeposited) in accordance with
SAE-AMS-P-81728. The ground lug(s) and the terminal end of the center shield shall be hot solder dipped
or coated. All surface treatments shall be electrically conductive (see 6.2).
3.3.6 Restricted material.
3.3.6.1 Waxes and varnishes. Unless otherwise specified, waxes or varnishes shall not be used.
3.3.6.2 Pure tin. The use of pure tin is prohibited see 6.2.2. The maximum amount of pure tin is 97
percent and the alloy material shall inhibit the growth of tin whiskers.
3.3.7 Recycled, recovered, or environmentally preferable materials. Recycled, recovered or
environmentally preferable materials should be used to the maximum extent possible provided that the
material meets or exceeds the operational and maintenance requirements, and promotes economically
advantageous life cycle costs.
3.4 Interface and physical dimensions. Sockets and accessories shall be of the physical dimensions
specified (see 3.1).
3.4.1 Sockets. Sockets shall be capable of properly mating with the applicable plug-in base (see 3.1).
3.4.2 Threaded parts. All threaded parts shall be in accordance with FED-STD-H28 and shall have the
specified fit after plating or other coating (see 3.1). All threaded parts shall engage by at least two full
threads.
3.4.3 Contact cavities. The arrangement of contact cavities in the insulator bodies of sockets shall be as
specified (see 3.1). Each contact cavity shall be fitted with a contact assembly so confined within the cavity
that accidental removal from the cavity is prevented, and positive alignment of the respective contacts,
including the contact tabs, around the pin circle is effected.
3.4.3.1 Contact clearance. The tops of the contacts in their uppermost position shall be below the upper
edge of the contact-cavity wall.
3.4.3.2 Contacts. When applicable (see 3.1), the requirements of MIL-C-39029 for crimp type
removable socket contacts shall apply.
3.4.4 Wire-connector holes on terminals. The center of each wire-connector hole of a flat ground lug or
contact tab shall lie on the approximate longitudinal centerline of the particular lug or tab. The longitudinal
position of, or relative spacing between, wire-connector holes on lugs or tabs is optional.
3.5 Performance. Sockets and accessories shall be designed to meet the performance requirements
specified herein.
6
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business