The part number **507-059NF23GL** corresponds to a high-performance **Micro-D Backshell** manufactured by **Glenair**. These components are critical in aerospace, defense, and high-reliability industrial applications for protecting D-Subminiature (Micro-D) connectors. ### Part Breakdown and Specifications | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | 507-059 | Round cable entry, split backshell design for Micro-D connectors. | | **Material/Finish** | NF | Aluminum Alloy with Cadmium Olive Drab finish (over Electroless Nickel). | | **Shell Size** | 23 | Designed for a 23-contact Micro-D connector layout. | | **Hardware** | G | Includes "Glenair" standard hardware (typically a fillister head screw). | | **Exit Style** | L | Denotes a specific cable entry orientation (typically "Long" or specific entry angle). | --- ### Key Technical Features 1. **Split Shell Design**: The backshell is designed in two halves. This allows for easy installation over existing wire harnesses and simplifies maintenance or inspection without desoldering contacts. 2. **EMI/RFI Shielding**: The aluminum construction and conductive finish provide excellent protection against Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI). 3. **Environmental Protection**: The **NF (Cadmium Olive Drab)** finish is the industry standard for tactical military hardware, providing high salt-spray resistance and durability in harsh environments. 4. **Strain Relief**: It prevents mechanical stress on the solder or crimp joints of the connector pins by securing the cable bundle firmly to the backshell body. ### Physical Properties * **Material**: Aluminum Alloy 6061-T6. * **Plating**: Cadmium with an Olive Drab Chromate coating (provides 500+ hours of salt spray resistance). * **Compatibility**: Fits standard MIL-DTL-83513 type Micro-D connectors. --- ### Common Applications * **Military Avionics**: Used in flight control systems where weight and space are limited. * **Satellite Systems**: High-reliability connection points that require shielding. * **Tactical Ground Gear**: Ruggedized communication devices used by infantry or in armored vehicles.