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The Goodman B1796632 Seal and Nut (3/8 in) is the OEM sealing assembly used at refrigerant tubing connections on ARPF374316BA air handlers and compatible Goodman/Amana coil assemblies. This 3/8-inch seal-and-nut set provides the leak-tight joint that keeps refrigerant in the system and contaminants out. Over time seals dry out, deform, or get damaged during service — replacing them with the correct factory part is the only reliable way to restore a positive seal.
Sealing components are cheap insurance — a mismatched generic seal that is even slightly off-spec will weep refrigerant and force a repeat repair. This genuine OEM seal and nut are sized exactly for the 3/8-inch fitting, so you get a confident, durable seal the first time.
Easy to Moderate. The mechanical swap is simple — back off the old nut, replace the seal, and torque the new nut to spec. However, any joint that contained refrigerant requires proper recovery, evacuation, and recharge, which should be handled by a certified technician.