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The Goodman B1796632 Seal and Nut (3/8 inch) is a genuine OEM sealing hardware set for ARUF049-00A-1B air handlers. This 3/8" seal-and-nut assembly creates a tight, leak-free connection at coil and line fittings, preventing refrigerant or condensate seepage at the joint. Seals harden and deform over time and during service work, so installing fresh OEM sealing hardware whenever a fitting is opened is cheap insurance against callbacks.
Sealing hardware must match the fitting's thread pitch and sealing-face profile precisely. The OEM B1796632 is machined to the original spec for a guaranteed seal, while generic nuts and seals may not compress evenly and can weep over time. On a sealed or condensate connection, the genuine part is the dependable choice.
Difficulty: Easy to Moderate. If the fitting is already accessible, replacement is a quick hand-tool job — back off the old nut, replace the seal, and torque the new nut to spec. If the connection is part of the refrigerant circuit, the line must be evacuated first, which makes it technician-level work. Always seat the seal cleanly and avoid over-tightening.