Brass flare fittings for service lines - flare nuts, flare x male pipe thread adapters, flare x hose tail stems and long flare-ended stems. The flare seals metal to metal on the cone, with no thread sealant on the flare itself.
Prices on request. Contact us for availability and quotations.
A flare fitting seals by pressing a cone machined on the fitting against a flare formed on the end of the tube, held by a nut running on a straight thread. The seal is metal to metal on the cone, so no tape or jointing compound goes on the flare face; sealant belongs only on a tapered pipe thread at the other end of the fitting, if there is one.
The set photographed is the usual service-line assortment in unplated brass: loose flare nuts, male flare to male pipe thread adapters, flare to hose tail stems, and long flare-ended stems for running through a bulkhead or a cylinder cabinet.
Flare angle is the one thing to get right. The flare used on appliance and refrigeration tube is the SAE 45° flare, specified in SAE J512 for automotive and appliance tube fittings and SAE J513 for refrigeration fittings, with the flare on the tube itself formed to SAE J533. The 37° JIC flare of SAE J514 is a hydraulic connection and looks almost identical. A 45° and a 37° fitting of the same nominal size will screw together and will leak. Confirm the angle of the fittings and of the flaring tool before mixing sources on a service line, and state the tube outside diameter and the thread when ordering.
| Flare Form | SAE 45° flare is the flare form used on the medium named in its standard, appliance and refrigeration tube - specified in SAE J512 (automotive and appliance tube fittings) and SAE J513 (refrigeration tube fittings). Verify the angle of the stock held before ordering. |
|---|---|
| Tube Flare | The single or double 45° flare formed on the tube itself is dimensioned in SAE J533 |
| Interchange Warning | A 45° flare fitting and a 37° JIC fitting (SAE J514) of the same nominal size will screw together and will leak. They are not interchangeable and no adapter should be improvised between them. |
