AC Nut 1/4 Inch Heavy – Heavy Duty Brass Flare Nut for Split AC Copper Pipe | Refrigerant Line Union Nut

Heavy-duty 1/4 inch brass flare nut used to join the copper refrigerant pipe between the indoor and outdoor units of a split AC. The "heavy" variant is thicker and more robust than the standard 1/4" nut, giving a stronger grip and better resistance to cross-threading during repeated installation and servicing. Fits standard 1/4" flared copper tubing on the liquid line. Compatible with all AC brands.