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The Goodman B1796632 Seal and Nut (3/8 inch) is a genuine OEM sealing kit for the Goodman AEPF42601BA air handler. This nut-and-seal assembly creates a leak-tight 3/8" refrigerant connection at the flowrator or metering joint. Refrigerant seals harden and deform over time, and any service that breaks this joint should be reassembled with fresh OEM sealing hardware to prevent slow leaks.
OEM ensures the thread pitch, seat angle, and seal durometer match the AEPF metering connection exactly. Generic 3/8" sealing washers may fit dimensionally but can vary in material and sealing pressure, increasing the risk of a slow refrigerant leak at a hard-to-reach joint.
Intermediate — The fitting itself is simple to torque, but accessing it and re-verifying a leak-free refrigerant circuit (pressure test / evacuation) requires HVAC tools and EPA 608 certification.