What fittings for ford 7.3 diesel regulated return system?

The fittings for a Ford 7.3L Power Stroke regulated return fuel system vary depending on the specific component and year of the truck. There isn't one single answer. You'll need to specify what you're working on to get accurate information. However, I can give you some general information and what to look for:

Common Fittings and Connections:

* High-pressure lines: These connect the high-pressure oil pump to the injectors. These lines typically use a high-pressure fitting, often a banjo bolt with a copper crush washer. The size and thread pitch will vary depending on the specific application.

* Low-pressure lines: These handle the fuel supply to the pump and the return to the tank. These usually employ standard SAE straight or flared fittings in various sizes (e.g., -6AN, -8AN, etc., or metric equivalents). You might also find compression fittings.

* Fuel filter: The fuel filter housing will have specific inlet and outlet fittings. These are often a specific size and type depending on the filter itself.

* Injector lines: These connect the high-pressure fuel lines to the injectors. As mentioned, these typically use banjo fittings with copper washers.

* Regulator: The fuel pressure regulator will have fittings for the supply line from the pump, the return line to the tank, and potentially a pressure gauge port. These fittings can vary greatly depending on the specific regulator used (factory or aftermarket).

To get accurate information, you need to:

1. Specify the year of your truck: The fuel system components and fittings changed slightly over the production years of the 7.3L Power Stroke.

2. Identify the specific component: Are you working on the fuel filter, the high-pressure lines, the regulator, etc.?

3. Examine the fitting: If you can, take a picture of the fitting and include dimensions (if possible). A local auto parts store, especially one familiar with diesel trucks, should be able to identify the fitting if you can provide a sample or a clear picture.

4. Consult a parts catalog: Online parts catalogs such as those from Ford or reputable aftermarket parts suppliers (e.g., NAPA, AutoZone, etc.) can help you identify the correct parts based on your truck's year and VIN.

Without more specific details, providing precise fitting information is impossible. Be meticulous in identifying the parts needed to avoid damaging the fuel system.