Flare nut and refrigerant pipe set, air conditioner, and freezer including the same

摘要

A flare nut (5) includes a nut main body (31) having a hexagonal outer surface ( 5b ) and a circular cylinder portion ( 32 ) provided so as to extend from the nut main body ( 31 ) to one opening end of an insertion hole ( 5a ) along the insertion hole (5a) in a circular cylindrical shape having a major diameter smaller than the nut main body (31), to which a waterproof cap 28 of a circular cylindrical shape bridging to a tube main body (33) of a flare tube (3) is attached.