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连接器插座的EMI（电磁干扰）固定螺母。此EMI固定螺母适用于面板、控制台或设备模块接口处使用的连接器插座配置。该EMI固定螺母用于一端与连接器插座连接，另一端与面板、控制台或设备模块内的光纤电缆连接。EMI保持螺母可以与连接器插头一起使用；然而其不打算用作暴露于机械和其他环境因素的电缆设备的一部分。 除了在腐蚀性（即盐-空气）环境中抵抗腐蚀之外，唯一的耐环境特征还包括充当波导以衰减通过连接器插座的EMI穿透的能力。

The performance requirements specified herein cover an EMI (Electromagnetic interference) retention nut intended for use with a MIL-PRF-64266 or MIL-DTL-38999 connector receptacle in a fiber optic only application. This EMI retention nut is intended for the connector receptacle configuration used at the interface to a panel, console or equipment module. This EMI retention nut is used for interface with the connector receptacle on one end and with the fiber optic cabling within the panel, console or equipment module on the other end. The EMI retention nut may be used with a connector plug; however, is not intended to be used as part of the cable plant where exposed to mechanical and other environmental factors. The only environmental resistant features include ability to act as a waveguide to attenuate EMI penetration through the connector receptacle in addition to resisting corrosion in a corrosive (i.e., salt air) environment.