## Common ground
All options refer to mechanical fasteners (spacers, standoffs) used to mount or position electronic components, panels, or devices.
## Options at a glance
**3926.90 – Plastic monomounts & spacers**
- **Defining trait:** Made from plastic, typically non-conductive and lightweight.
- **Typical examples:** Plastic standoffs for circuit boards, insulating spacers in enclosures.
- **Best fit when:** Electrical insulation or lightweight, low-cost mounting is needed.
**7616.99 – Aluminum monomounts & edgemounts**
- **Defining trait:** Made from aluminum, offering strength, heat dissipation, and durability.
- **Typical examples:** Metal standoffs in industrial enclosures, aluminum edge mounts for panels.
- **Best fit when:** High mechanical strength, thermal conductivity, or metal aesthetics are required.
## Key differences
| Feature | 3926.90 (Plastic) | 7616.99 (Aluminum) |
|---------------------|--------------------------|----------------------------|
| Material | Plastic | Aluminum |
| Electrical conductivity | Non-conductive | Conductive |
| Weight | Light | Heavier |
| Durability | Moderate | High |
## How to choose
- Is the product made of plastic? → 3926.90
- Does it need to conduct heat or provide strong mounting? → 7616.99
## Overlaps & pitfalls
A product may include both plastic and aluminum parts (e.g., hybrid mounts), but the primary material determines classification. If unclear, prioritize based on the **main structural material**. The term "hybrid" in Option 3926.90 suggests mixed materials, which could overlap—use the dominant material for classification