MIL-DTL-24231E(SH)
3.3.3 Retainer plates and retainer plate assemblies. Retainer plates and retainer plate assemblies shall be made
from Ni-Cu alloy in accordance with Class A, Form 1, hot finished of QQ-N-281 with a minimum yield strength of
40,000 lbf/in2 at 0.2 percent offset or Ni-Cu alloy in accordance with Class A, Form 1, cold drawn of QQ-N-281
with a minimum yield strength of 50,000 lbf/in2 at 0.2 percent offset.
3.3.4 Pin and socket contacts.
3.3.4.1 Pin contacts. Unless otherwise specified (see 3.1), pin contacts shall be Bendix Aviation Corporation,
size 16M, short, part no. 10-101515-15P, gold plated; L.L. Rowe Company, part no. 40096; Connector Technology,
part no. PC001086; or equal. Any other pin contact submitted as equal is subject to NAVSEA approval.
3.3.4.2 Socket contacts. Unless otherwise specified (see 3.1), socket contacts shall be Bendix Aviation
Corporation, size 16M, short, part no. 10-101515-15S, gold plated; L.L. Rowe Company, part no. 40097; Connector
Technology, part no. SCA1315-1; or equal. Any other socket contact submitted as equal is subject to NAVSEA
approval.
3.3.5 Molded inserts. Material for molded inserts shall be as specified (see 3.1) or equal. Any material
submitted as equal is subject to NAVSEA approval.
3.3.6 O-ring packings. O-ring gaskets shall be in accordance with SAE-AMS7276, SAE-AMS7259, SAE-
AMS3216, or SAE-AMS3218. Refer to MIL-P-25732 for guidance. Size shall be as specified (see 3.1). O-rings
shall be lubricated with a light film of silicone compound in accordance with SAE-AS8660 at the time of assembly.
3.3.7 Caps and sealing plugs. Pressure-proof protective caps and sealing plugs shall be of the material
specified (see 3.1). Where caps or sealing plugs are not specified, refer to L-P-390 for guidance in installing Type I
plastic end caps to prevent damage to threads or entrance of water or dust.
3.3.8 Prohibited materials. Asbestos, cadmium, and mercury (see 3.3.8.1) shall not be used in construction of
pressure-proof fittings covered by this specification.
3.3.8.1 Mercury. Mercury in any form shall not be used in manufacturing and test processes (including test
equipment such as mercury thermometers) applying to the basic hull fitting, but may be used in manufacturing and
test processes for materials and parts provided it is used in such a way that contamination of the materials and parts
themselves cannot result.
3.3.9 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 Construction. The construction and physical dimensions shall be as specified herein and in 3.1.
3.4.1 Pin and socket contact assemblies. Contact arrangements and spacing shall be as specified (see 3.1).
Solder cups shall be aligned to facilitate soldering.
3.4.1.1 Soldering. Soldering should follow the guidance provided in Guideline 5 of MIL-HDBK-454.
3.4.1.2 Socket contacts. Before, during, and after molding, contact surfaces of socket contacts shall be free of
dirt, grease, or any other contaminants at all times. Removal of contamination after molding shall not be allowed as
cleaning may damage or remove gold plating.
3.4.1.3 Sleeving. Sleeving shall be installed over each socket contact with the end of the sleeve 1/32 inch from
the face of the plug. Polyurethane shall not enter into the socket contact.
3.4.2 Wires and cables. Unless otherwise specified (see 6.2), wires and cables shall be as specified (see 3.1).
3.4.2.1 Conductor color code. Unless otherwise specified (see 6.2), the individual conductor color code
number in cables shall be connected to the matching number of socket contacts.
3.4.2.2 Cable identification. The cable type shall be permanently marked on the molded plug or the cable
within 6 inches of each plug. The cable manufacturer s repetitive cable identification markings are acceptable.
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