The part number **561-R2520.62** typically refers to a specific type of electronic hardware component, specifically a **Round Spacer** or **Standoff**, manufactured by companies like **Mouser** or **Keystone Electronics** (often using the 561-prefix for internal classification). --- ### 1. Component Specifications This part is a mechanical component used within electronic assemblies to provide spacing between PCBs (Printed Circuit Boards), chassis, or other components. | Feature | Specification (Typical) | | :--- | :--- | | **Material** | Nylon 6/6 (Natural) | | **Internal Diameter (ID)** | .257" (designed for a #1/4 screw) | | **Outer Diameter (OD)** | .500" (1/2 inch) | | **Length** | .625" (5/8 inch) | | **Shape** | Round | | **Type** | Clearance (Unthreaded) | --- ### 2. Key Characteristics * **Non-Conductive:** Being made of Nylon 6/6, it provides excellent electrical insulation, preventing short circuits between stacked boards. * **Corrosion Resistance:** Nylon is resistant to many chemicals and environmental factors, making it more durable than metal in humid conditions. * **Lightweight:** Significant weight savings compared to brass or stainless steel alternatives. * **Thermal Stability:** It can withstand moderate heat generated by standard electronic operations. --- ### 3. Common Applications 1. **PCB Stacking:** Maintaining a fixed distance between two parallel circuit boards. 2. **Chassis Mounting:** Isolating the bottom of a PCB from a metal enclosure to prevent grounding issues. 3. **Component Elevation:** Raising high-heat components away from the surface of the board to improve airflow. --- ### 4. Part Number Breakdown While manufacturer codes vary, the suffix usually indicates the dimensions: * **561**: Category code (Plastic hardware/Spacers). * **R**: Round shape. * **25**: Refers to the internal clearance (often for 1/4" screws). * **20**: Refers to the Outer Diameter. * **.62**: Refers to the length (0.625 or 5/8").