DeatschWerks 8AN Male Flare to 3/8in Hardline Compression Adapter - Anodized Matte Black

Anodized Matte Black 8AN Male Flare to 3/8-Inch Hardline Compression Fitting with Olive Insert

The DeatschWerks 8AN Male Flare to 3/8-Inch Hardline Compression Adapter (part number 6-02-0110-B) is a precision-machined fuel system fitting that connects 8AN male flare lines to 3/8-inch steel or stainless hardline fuel tubing. The anodized matte black finish provides a clean, professional appearance while the hard-coat anodize protects against corrosion and fuel system chemicals for long-term reliability.

Part 6-02-0110-B uses a compression-style fitting with an included olive insert (ferrule) that creates a leak-free metal-to-metal seal against the outside diameter of the hardline. This fitting is suitable for fuel, oil, and other fluid applications where a transition from 3/8-inch hard line to an 8AN male flare fitting is needed. It allows builders to connect a braided stainless AN-style hose or fitting to an existing factory-style or custom steel hardline without cutting threads or using compression rings that require specialized tools.

DeatschWerks part 6-02-0110-B is the 8AN version of the hardline compression adapter series. The 6AN version is part 6-02-0109-B (3/8-inch hardline to 6AN). The 8AN to 1/2-inch version is part 6-02-0111-B. These adapters are commonly used in EFI fuel system builds, fuel rail connections, return-style fuel system plumbing, and oil feed line routing where compact, professional connections are required in a high-performance build.

What's Included

• 1 DeatschWerks 8AN male flare to 3/8-inch hardline compression adapter (part 6-02-0110-B)
• 1 olive insert (ferrule, pre-included)

Specifications

Application Notes

Part 6-02-0110-B is a universal fitting suitable for any high-performance vehicle application requiring a connection between 3/8-inch hardline tubing and an 8AN male flare port. Common uses include fuel rail connections, fuel pump hardline exits, EFI return line plumbing, oil feed lines, and custom fuel system builds. Always verify that the hardline OD is exactly 3/8 inch before installation. Tighten to the manufacturer-specified torque for AN compression fittings using two wrenches to avoid twisting the hardline.

Frequently Asked Questions

What is the difference between DeatschWerks part 6-02-0109-B and 6-02-0110-B?
Part 6-02-0109-B is a 6AN male flare to 3/8-inch hardline compression adapter. Part 6-02-0110-B is an 8AN male flare to 3/8-inch hardline compression adapter. Both fit the same 3/8-inch hardline, but 6-02-0110-B has a larger 8AN male flare end, which is typically used where higher flow capacity or a specific 8AN port is required.

Does the DeatschWerks 6-02-0110-B come with an olive insert?
Yes. Part 6-02-0110-B includes one olive insert (ferrule) for completing the compression seal onto 3/8-inch hardline tubing. No additional ferrule purchase is required for a standard installation.

Can I use the DeatschWerks 6-02-0110-B on a fuel return line?
Yes. This adapter is suitable for fuel supply and return line applications in return-style and returnless EFI fuel systems. It is designed to handle fuel, oil, and similar automotive fluids.

What hardline diameter does the DeatschWerks 6-02-0110-B accept?
Part 6-02-0110-B accepts 3/8-inch outside diameter hardline tubing. This is a common size for factory fuel feed lines on many domestic trucks and performance vehicles. Verify your hardline OD with calipers before ordering to ensure compatibility.

Is the DeatschWerks 6-02-0110-B suitable for stainless steel hardline?
Yes. The compression fitting design is compatible with both steel and stainless steel hardline tubing of 3/8-inch outside diameter. The aluminum body and included olive insert create a secure, fuel-safe seal on both materials.

What is the 8AN male flare angle on the DeatschWerks 6-02-0110-B?
The 8AN male flare on part 6-02-0110-B uses a standard 37-degree JIC/AN flare, which is the universal standard for AN-style fittings used in high-performance fuel, oil, and hydraulic systems.

Can I use the DeatschWerks 6-02-0110-B on an oil feed line?
Yes. This adapter is suitable for oil feed and drain line applications as well as fuel line plumbing. It is designed for general high-performance fluid system use where an 8AN to 3/8-inch hardline transition is needed.

Does the DeatschWerks 6-02-0110-B require any special tools to install?
A standard AN wrench or open-end wrench of the appropriate size is needed to tighten the compression body. Two wrenches should be used during tightening to avoid putting rotational stress on the hardline. No special compression-specific tools are required beyond standard AN plumbing hand tools.

California Prop 65 Warning

WARNING: This product can expose you to chemicals including aluminum and its compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.