此处规定的性能要求包括用于仅光纤应用中的MIL-PRF-64266或MIL-DTL-38999连接器插头或插座的后壳。该后壳适用于开放式电缆线束配置，其中一束单光纤电缆（单工光缆）布线至连接器插头或插座，无需外部保护。该后盖用于一端与连接器插头或插座接口，另一端不包含接口。抗环境特性包括限制每条电缆的移动、位置和扭曲的能力，此外还可以消除或减少对各种环境的渗透。 该后壳是一种分体式（蛤壳）壳体结构，由前适配器、后适配器和两个（分体式）壳体半部组成。分体式外壳提供了一种方便检查、故障排除和维修的方法。

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 an open cable harness configuration in which a bundle of single fiber cables (simplex optical cables) are routed to the connector plug or receptacle with no external protection. This backshell is used for interface with the connector plug or receptacle on one end and contains no interface 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.