AC Nut 3/8 Inch Heavy – Heavy Duty Brass Flare Nut for Split AC Copper Pipe | Universal Refrigerant Line Union Nut

Heavy-duty 3/8 inch brass flare nut used to join the copper refrigerant pipe between the indoor and outdoor units of a split AC. The "heavy" build is thicker and more robust than the standard 3/8" nut, giving a stronger grip and better resistance to cross-threading during repeated installation and servicing. Fits standard 3/8" flared copper tubing, commonly used on the suction (gas) line of 1 to 1.5 ton units. Compatible with all AC brands.