MIL-DTL-25955A
3.9.2 Finish, hermetic. Contacts and shells for class H connectors shall be cadmium plated.
Preliminary plating of another metal is permissible. All other metal parts shall be finished in a fashion
suitable for compliance with the requirements of this specification and normal service installation and use.
3.10 Identification of product. Each connector shell or coupling ring shall be legibly and permanently
marked in accordance with MIL-STD-130 with the following information.
a. Manufacturers code designating numbers shall be in accordance with federal supply code for
manufacturers or the manufacturers name or trade mark.
b. The connector PIN.
3.10.1 Insert marking. Inserts shall be marked as illustrated in the applicable detail document.
3.10.1.1 Contact letter designation. Contacts shall be designated by legible, raised or depressed
letters on the front and rear face of each insert. Letter positioning shall be as illustrated in the applicable
detail document and shall be such as to avoid confusion between contacts. Lettering of socket contact
inserts shall be reversed in position to coincide with pin contact insert lettering when mated. Contact
letter designations may be omitted only when space limitations render legibility or proper functioning of
the connector impossible.
3.10.1.2 Contact designation lettering. The arrangement of contact letter assignment shall begin
clockwise when viewed from the front face of pin inserts (counter clockwise for socket inserts) in circles of
decreasing radii unless excepted by the detail document. The contact designators shall be of the
following letters and sequences.
ABCDEF-H-JKLMN-P-RSTUVWXYZ
Abcd-fghijk-mn-pqrstuvwxyz
AA, AB, AC, ...etc.
3.10.2 Grommet marking. Grommet wire openings shall be marked with legible raised or depressed
letters corresponding to the insert contact designators where space permits.
3.11 Workmanship. Details of workmanship shall be in accordance with high-grade manufacturing
practices for similar connectors. All sharp corners shall be broken and the contacting surfaces of all
contacts shall be smooth.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
follows:
a. Qualification inspection (see 4.4).
b. Conformance inspection (see 4.5).
4.2 Test equipment and inspection facilities. Test and measuring equipment and inspection facilities of
sufficient accuracy, quality, and quantity to permit performance of the required inspection shall be
established and maintained by the contractor. The establishment and maintenance of a calibration
system to control the accuracy of the measuring and test equipment shall be in accordance with
NCSL Z540.1.
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