MIL-DTL-83538 Connectors And Accessories, Electrical, Circular, Umbilical, Environment Resistant, Removable Crimp Contacts For Mil-Std-1760 Applications \(Metric\), General Specification ForThis specification covers connectors and accessories, electrical, circular, umbilical. The connector assembly provides the necessary connections required to meet MIL-STD-1760, class I electrical interface between stores and their associated launchers using a "blind mating" mechanism. The connector assembly consists of a receptacle installed on the launcher, a receptacle installed on the store, and a buffer plug installed between the two receptacles. This specification also includes the required mounting adapters and nut, accessory adapter, cable bushing, and protective covers \(see 6.1 for details on intended use and application\). The connectors covered by this specification are intended for use with launcher mechanisms with an applied holding force in the range 271 Newtons \(61 lbs\) to 427 Newton \(96 lbs\).

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MIL-DTL-83538D

1) The first 2 assemblies shall comprise:

a. A clamp JN1092HS23 or a suitable straight clamp in accordance with SAE-AS85049.

b. An adapter in accordance with MIL-DTL-83538/9, style C.

c. A launcher receptacle in accordance with MIL-DTL-83538/4, style B.

d. A hybrid buffer plug in accordance with MIL-DTL-83538/11.

e. A store receptacle in accordance with 4.4.2a.

2) The second 2 assemblies shall comprise:

a. A clamp JN1092HS23 or a suitable straight clamp in accordance with SAE-AS85049.

b. An adapter in accordance with MIL-DTL-83538/9, style C.

c. A launcher receptacle in accordance with MIL-DTL-83538/4, style A or style B.

d. A buffer plug in accordance with MIL-DTL-83538/3.

e. A store receptacle in accordance with MIL-DTL-83538/1

The frequency specified in 4.6.17.1c will vary depending on the value of Wo selected.

4.6.17.3 Gunfire vibration. Wired and mated connector assemblies shall be subjected to a functional

test in accordance with MIL-STD-810, method 519.5, except that T1 shall be at 20 Hz and 2 kHz instead

of 30Hz and 2KHz, at the levels defined in table XIII, which are applied for 26.5 minutes in each of the 3

axis.

TABLE XIII. Gunfire vibration.

T1 (g2/Hz) = 0.037

T2 (g2/Hz) = 0.765

T3 (g2/Hz) = 2.518

Overall gms = 37.18

F1 (Hz) = 28.3

F2 (Hz) = 56.6

F3 (Hz) = 84.9

F4 (Hz) = 113.2

P1 (g2/Hz) = 2.312

P2 (g2/Hz) = 2.440

P3 (g2/Hz) = 2.784

P4 (g2/Hz) = 3.833

4.6.18 Shock. Wired and mated connectors shall be subjected to the applicable test specified.

Connectors shall be monitored for any discontinuities. A detector capable of detecting all discontinuities

in excess of 1 microsecond shall be used. A suitable fixture, approved by the qualifying activity, shall

apply the holding force specified in 3.4.7.2 to hold the connector pair together (see figure 14 and 3.22).

4.6.18.1 Standard shock. Connectors shall be subjected to the test specified in test procedure

EIA-364-27. The following details shall apply:

a. The pulse shall be an approximate half sine wave of 300 g's �15 percent magnitude with a

duration of 3 �1 milliseconds.

b. The wire bundle shall be clamped to fixed points at least 203.2 mm (8 inches) from the rear of the

connector.