The part number **507-059M02L** refers to a high-performance, circular connector accessory, specifically a **Micro-D Backshell** manufactured by **Glenair**. These components are critical in aerospace, defense, and high-reliability industrial electronics for cable management and electromagnetic interference (EMI) shielding. --- ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Glenair | | **Series** | 507 (Micro-D Backshells) | | **Shell Size** | 09 (Designed for 9-contact Micro-D connectors) | | **Material** | Aluminum Alloy | | **Finish** | Electroless Nickel (Code M) | | **Entry Type** | Side Entry (L-shaped or 90-degree profile) | | **Hardware** | Low Profile Jackscrews | --- ### Component Breakdown #### 1. Material and Coating (The "M") The **"M"** in the part number signifies **Electroless Nickel**. This finish is preferred in electronic systems because: * It provides excellent electrical conductivity for grounding. * It offers superior protection against corrosion and wear. * It assists in meeting EMI/RFI shielding requirements by ensuring metal-to-metal continuity. #### 2. Geometry and Design (The "02L") * **Side Entry:** This backshell allows the cable to exit at a 90-degree angle relative to the connector face. This is essential for "tight-fit" applications where space behind the panel is limited. * **Strain Relief:** It protects the delicate solder or crimp joints of the Micro-D connector from mechanical stress and vibration. #### 3. Application Use Cases Because this part is built to MIL-DTL-83513 standards (or compatible with them), it is commonly found in: * **Avionics:** Cockpit instrumentation and flight control systems. * **Satellites:** Internal wiring where weight and space are premium. * **Medical Imaging:** High-density signal routing in diagnostic equipment. --- ### Comparison with Standard Backshells | Feature | 507-059M02L | Standard Plastic Backshell | | :--- | :--- | :--- | | **Durability** | High (Metal) | Low (Polymer) | | **EMI Shielding** | Excellent | None/Poor | | **Weight** | Moderate (Lightweight Aluminum) | Very Light | | **Environment** | Harsh/Military Grade | Commercial/Office |