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This Nitrous Express 3AN black B-nut is a single-piece pipe fitting cap used in fluid system assemblies to cap 3AN connections. Offered as a replacement or service part, the black finish matches other AN hardware while providing a simple sealing solution for unused or service-disconnected lines. Use it where a 3AN B-nut cap is required to protect threads and prevent fluid loss during maintenance or storage.
Nitrous Express 3AN Black B-Nut (Qty 1)
