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

6.11 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may

exhibit tin whisker growth problems after manufacture. Tin whiskers may occur anytime from a day to

years after manufacture and can develop under typical operating conditions, on products that use such

materials. Conformal coatings applied over top of a whisker-prone surface will not prevent the formation

of tin whiskers. Alloys of 3 percent lead, by mass, have shown to inhibit the growth of tin whiskers. For

additional information on this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited

Coatings of Tin) (see 3.43).

LAUNCHER CONNECTOR

FWD

UMBILICAL, RECEPTACLE

BUFFER CONNECTOR

UMBILICAL PLUG

STORE CONNECTOR

UMBILICAL RECEPTACLE

FWD

FIGURE 1. Electrical umbilical assembly.