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The Goodman B1796632 Seal and Nut is a genuine OEM 3/8 inch sealing fitting used on ARUF032-00A-1 air handlers and compatible Goodman/Amana models. It maintains a leak-free connection at the refrigerant line-set or drain fitting, preventing air bypass and moisture intrusion that can degrade coil performance over time.
This is a genuine Goodman OEM part, machined to factory tolerances for a guaranteed seal and fit. Generic aftermarket seals may vary slightly in thread pitch or sealing-face diameter, risking slow leaks. For a critical sealing point like this, OEM is the recommended choice to protect your warranty and avoid callbacks.
Easy — a basic hand-tool job for any HVAC technician. Always de-energize the unit and recover refrigerant before opening a sealed connection.