本欧洲标准规定了带有防松螺母的密封插座的特性，该插座安装在圆形电气连接器系列中，带有三重启动螺纹接头。它适用于表3中的模型。插头和保护盖分别见EN 3645-006、EN 3645-008、EN 3645-011和EN 3645-012。触点是不可移动和焊接的终端。这些连接器源于规范MIL-DTL-38999\/23中的Y型，并可与之互换。

This European Standard specifies the characteristics of hermetic receptacles with jam nut mounting in the family of circular, electrical connectors, with triple start threaded coupling. It applies to models in Table 3. For plugs and protective covers, see EN 3645-006, EN 3645-008, EN 3645-011 and EN 3645-012 respectively. The contacts are unremovable and soldered termination. These connectors are derived from and interchangeable with model Y in specification MIL-DTL-38999/23.