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The genuine OEM Goodman B1796632 Seal and Nut (3/8 inch) is the sealing fitting set used on the refrigerant line connection of your ARPF364216AC air handler coil. A worn seal or backed-off nut is a common source of slow refrigerant leaks at the line-set joint — this factory kit restores a leak-tight connection.
This genuine OEM Goodman seal and nut are dimensioned for the exact 3/8" port on the ARPF364216AC. Generic seals may not match the sealing surface and can weep refrigerant. OEM is recommended for any sealed-system fitting.
Intermediate to Advanced. If the joint is on the sealed refrigerant circuit, refrigerant recovery and recharge by an EPA-certified tech is required. The mechanical seal/nut swap itself is straightforward with proper torque.