The part number **507T175M1503** refers to a high-performance **Micro-D connector accessory**, specifically a backshell (also known as an EMI/RFI adapter). These components are manufactured by companies like **Glenair** and are designed for high-reliability applications such as aerospace, defense, and industrial robotics. ### Part Number Breakdown The alphanumeric code describes the specific physical and material characteristics of the part: | Segment | Meaning | Description | | :--- | :--- | :--- | | **507** | Product Series | Glenair Series 507 Micro-D Backshells. | | **T** | Type | Typically indicates a "Top Entry" configuration. | | **175** | Shell Size | Corresponds to the number of contacts (e.g., Size 15, 21, 100). | | **M** | Material/Finish | Electroless Nickel (Conductive finish for EMI shielding). | | **15** | Entry Size | The diameter of the cable entry hole (0.150 inches). | | **03** | Hardware | Specifies the mounting hardware (e.g., fillister head jackcrews). | --- ### Key Technical Specifications * **Function:** It acts as a protective housing for the wires exiting a Micro-D connector, providing strain relief and environmental protection. * **Shielding:** The "M" finish (Electroless Nickel) provides excellent electrical conductivity, making it ideal for **EMI/RFI (Electromagnetic Interference)** shielding. * **Durability:** Made from high-grade aluminum alloy, designed to withstand extreme vibration and mechanical shock. * **Compatibility:** Designed to mate with **MIL-DTL-83513** type connectors. --- ### Applications 1. **Avionics:** Used in flight control systems where weight and space are critical. 2. **Satellites:** High-reliability connections that must survive the vacuum of space. 3. **Medical Imaging:** Used in devices that require dense wiring and high signal integrity. 4. **Military Hardware:** Ruggedized communication systems. --- ### Comparison: Standard vs. EMI Backshells | Feature | Standard Plastic Backshell | 507T175M1503 (Metal) | | :--- | :--- | :--- | | **Durability** | Low | High | | **EMI Shielding** | None | Excellent | | **Weight** | Very Light | Light (Aluminum) | | **Operating Temp** | Limited | -65°C to +150°C+ |