本文规定的性能要求包括仅用于光纤应用的MIL-PRF-64266或MIL-DTL-38999连接器插头或插座的后壳。该后壳适用于电缆束配置，其中一束单光纤电缆（单工光缆）通过卷曲管敷设至连接器插头或插座。该后壳用于连接一端的连接器插头或插座，以及另一端的卷曲管。抗环境特性包括能够限制每根电缆的移动、位置和扭曲，以及消除或减少各种环境的渗透。 该后壳是一种分体式（蛤壳）壳结构，由一个前适配器、一个后适配器和两个（分体式）壳半组成。分体式壳体为检查、故障排除和维修提供了方便。

The performance requirements specified herein cover a backshell intended for use with a MIL-PRF-64266 or MIL-DTL-38999 connector plug or receptacle in a fiber optic only application. This backshell is intended for the cable harness configuration in which a bundle of single fiber cables (simplex optical cables) are routed through convoluted tubing to the connector plug or receptacle. This backshell is used for interface with the connector plug or receptacle on one end and with the convoluted tubing on the other end. Environmental resistant features include ability to restrict movement, position, and twist of each cable in addition to eliminate or reduce penetration of various environments. This backshell is one of a split (clam shell) shell configuration consisting of a front adapter, rear adapter, and two (split) shell halves. Split shell halves offer a means of easy access for inspection, troubleshooting and repair.