| Part Number | 640550-4 | 640551-4 |
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| Manufacturer | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors |
| Category | Rectangular Connectors - Accessories | Rectangular Connectors - Accessories |
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| Product Status | Active | Active |
| Accessory Type | Cap (Cover), Dust | Cap (Cover), Dust |
| Number of Positions | 4 | 4 |
| For Use With/Related Products | MTA-100 Series | MTA-156 Series |
| Features | Closed End | Closed End |