MIL-DTL-24308G
3.3.4.2.1 Overall finish. Contact bodies shall be overall gold plated in accordance with ASTM B488, type II, code C,
class 1.27, over a suitable underplate (see 6.5). Silver shall not be used as an underplate. Nickel shall not be used
as an underplate on classes M and N. The finish on contact bodies of class H and K connectors shall be gold plated
in accordance with ASTM B488, type II, code C, class 1.27. Preliminary plating of another metal is permissible.
3.3.4.2.2 Localized finish. Contact bodies shall be overall nickel plated in accordance with MIL-DTL-38999,
appendix A, except plating thickness shall be 30 to 150 microinches thick (see 6.5). Mechanical operations may be
performed after application of plating.
3.3.4.2.2.1 Contact mating area. The contact mating area as shown on figure 1 shall be gold plated in accordance
with ASTM B488, type II, code C, class 1.27, over nickel plating (see 3.3.4.2.2).
3.3.4.2.2.2 Terminations. Terminations shall be plated as follows:
a. Solder cups: 100 microinches minimum tin-lead plated in accordance with SAE AMS-P-81728, 50 to 95
percent tin.
b. Insulation displacement: 100 microinches minimum tin-lead plated in accordance with SAE AMS-P-81728, 50
to 95 percent tin.
c. Printed wiring tails: Dimension M in accordance with MIL-DTL-24308/23 and MIL-DTL-24308/24, 100
microinches minimum tin-lead plated in accordance with SAE AMS-P-81728.
3.3.5 Dielectric materials.
3.3.5.1 Insert. Insert material type SDG-F or GDI-30F in accordance with ASTM D5948, or TPES013G30,
TPES023G30 or TPES102G30 in accordance with ASTM D5927, or type GPT-30F, GET-30F or GCT-30F in
accordance with or MIL-M-24519 or PPS000G40A63463EA220ED037EE030EF125EG100EH150FL310Y11 in
accordance with ASTM D4067, for classes D, G, M, and N connectors. Insert dielectric materials for classes H and K
shall be glass.
3.3.6 Metal components. Metal components shall be of high grade corrosion resistant material or a material
treated to resist corrosion, which will allow the complete connector assembly to meet the requirements of this
specification.
3.3.6.1 Finish (classes G and N). Shells shall be cadmium plated in accordance with type II, class 2 of
SAE-AMS-QQ-P-416 or zinc nickel alloy in accordance with ASTM B841 an underplate is optional or Nickel
Fluorocarbon Polymer an underplate is optional or pure electrodeposited aluminum in accordance with MIL-DTL-
83488 or zinc plated in accordance with ASTM B633. A preliminary plating of another metal is permissible. The
resulting finish shall be electrically conductive, and shall be of a golden color to ensure that the chromate finish has
been properly applied. Corrosion-resistant steel parts including shells shall be passivated in accordance with SAE-
AMS2700, type 2 and need not be overplated.
3.3.6.2 Finish for class H connectors. Unless otherwise specified, all metal parts for class H connectors shall be tin
plated in accordance with ASTM B545. Preliminary plating of another metal is permissible. Tin shall contain a
minimum of 3% lead to prevent tin whiskers.
3.3.6.3 Finish for classes D, K, and M connectors. All metal parts for classes D and K connectors shall be
Electroless Nickel in accordance with SAE-AMS2404, class 3 or 4, .0005 inch minimum thickness or electrically
conductive nickel-phosphorus conforming to ASTM B733, class 1 or 2, type III, .0005 inch minimum thickness. The
finish shall be dull. Use of a suitable underplate is permissible. For class M, the finish shall be gold in accordance
with ASTM B488 grade C, class 1.27 over a suitable underplate (see 6.5). A silver underplate shall not be used.
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.
3.3.8 Pure tin. The use of pure tin is prohibited. Tin content used in connector materials shall not exceed 97
percent, and an alloy material shall be chosen to inhibit the growth of tin whiskers (see 6.7).
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