Best Union Fuel System Fittings in 2026

Fuel cell bulkhead size is -6 AN

Radiused entries for unrestricted flow

Allows you to connect fuel lines to fuel cells

Size: Female AN6 to Female AN6, the thread size is 9/16-18 UNF.

Parameter: Max Working Pressure: 1500PSI. Working Temperature Range: -65℉ to 252℉.

Sealing: The AN side of the flare is sealed by a 37 degree angle.

Use these fittings to adapter a -8 ORB port to a -6 hose end.

37 degree flare fitting (automotive standard)

Black Anodized Aluminum Finish

The female to male fitting adapter size: female 8an to male -8an (3/4-16 UNF) thread pipe connectors, 90 degree swivel hose fitting adapter

Forged swivel 6an elbow design fitting can be used with fuel, oil, gas, fluid, water, air line. 90 degree adapter fitting can allow for the connection of hose ends to other components like oil pumps, fuel pumps and fuel filters

The 90 degree adapter fitting forged swivel elbow design, swivel 360° elbow design allows you to get things reasonable tight while still maintaining the swivel functionality so that you can ensure a proper connection and positioning before doing that final. The swivel fitting has 37-degree sealing angle design assures leak free performance

GlowShift 3/8” Fuel Line Fuel Pressure Barbed Push Lock T-Fitting Adapter Allows Users to Install a Fuel Pressure Sensor to a 3/8" Inner Diameter Fuel Line

Features 3/8" (9.5mm I.D) Barbed Push Lock Fittings, 1/8-27 NPT Port for Fuel Pressure Gauge Sensor & 2 Hose Clamps

Manufactured from 304 Stainless Steel that Prevents Corrosion

JIC -6 AN male thread (9/16-18) to 3/8" tube hardline connector with 3/8 ID brass insert

Constructed of 6061 T6 aircraft grade lightweight aluminum material

Black anodized finish

The female to male fitting adapter size: female 10an to male -10an (7/8-14 UNF) thread pipe connectors, 90 degree swivel hose fitting adapter

The 90 degree bulkhead fitting can allow for the connection of hose ends to other components like oil pumps, fuel pumps and fuel filters

The 90 degree adapter fitting forged swivel elbow design, swivel 360° elbow design allows you to get things reasonable tight while still maintaining the swivel functionality so that you can ensure a proper connection and positioning before doing that final. The swivel fitting has 37-degree sealing angle design assures leak free performance

1/8" NPT to 4AN Adapter, 1/8 to 4AN

CNC Machined Aluminum

Anodized to provide corrosion resistance and shine.

What you will receive: there are a total of 2 pieces fitting adapters, and equipped with 2 pieces brass inserts in the package, adequate quantity can meet your daily use and replacement demands, which can replace the broken one or old one, and you can share with your close friends, family members, colleagues and people who need them

Sturdy material: these fuel fittings are made of quality aluminium alloy, firm and solid, will not break or deform easily, with metallic luster, can keep bright after long term use, the surface and edge are polished carefully, skillful workmanship makes them smooth to touch, do not worry they will scratch your hands or cars while using, not easy to wear and tear

Size details: this fuel line adapter fitting is measured approx. 1.77 inches in length and 0.59 inch in width, appropriate in size and light in weight, convenient for you to use and store; And which is 6 AN to 3/ 8 inch, the thread size of the 6 AN is 9/ 16 UNF, and it fits to 3/ 8 inch OD hardline, please measure before purchase

Size: JIC -8 AN Male (3/4-16) Thread Flare to 3/8" SAE tube connector

Made of High Performance Lightweight 6061-T6 CNC Machined Billet Aluminum Material

Black Anodized Finish for Durability and Strength

100% Brand New pair of fuel rail fitting adapters.

CNC Machined from 6061-T6 Aluminum. Black anodized for great appearance and anti-corrosion

Specification : 6 AN (male) to 3/8 & 5/16 (female) GM Quick Connect Straight Adapter Fitting

ANTI-CORROSION - This fuel line T-fitting adapter is made from 304 stainless steel that prevents Corrosion.

LEAK-FREE - The barbed design increase the sealing of adapter and fuel line and The two hose clamps are for installation in tight-fittings and secure the vehicle’s fuel line to the barbed fittings for a leak-free connection.

FUNCTION - Fuel line fuel pressure barbed push lock t-fitting adapter allows users to install a fuel pressure sensor to a 3/8 In inner diameter fuel line,T-fittings allows you to tee off your vehicle,s fuel line for accurate fuel pressure readings directly from the source.Protect your engine!

Female -6 AN (9/16"x18) swivel to 3/8 inch barb fuel line quick disconnect tube adaptor, straight

Made of High Performance Lightweight 6061-T6 CNC Machined Billet Aircraft Aluminium Material

Black Anodized Finish for Durability and Strength

Features 8mm (5/16") Barbed Fittings, 1/8-27 NPT Female Thread Port for Fuel Pressure Gauge Sensor & 2 Hose Clamps to Secure Fuel Line to T-Fitting

Packing Including: 2 Brass Barbed Fittings 5/16"(8mm) ，2 stainless steel clamp with handle and Teflon tape

Fuel Line Fuel Pressure T-Fitting Adapter Allows Users to Install a Fuel Pressure Sensor to the Fuel Line

JIC 4 AN male flare to female AN 4 hose union take off pipe fitting with 1/8" gage port

Made from aerospace-quality lightweight 6061 t6 cnc machined billet aluminum alloy

Black Anodized Finish for Long Last, Strength and Durability

Material: 304 Stainless Steel; Highly resistant to corrosion.

Inlet Thread Size: 1/8" NPT Male; Outlet Thread Size: 1/8" NPT Female;

Center Tap Thread Size: 1/8" NPT Outlet Female.

AN8 JIC -8 AN female to AN8 male flare 3/4-16 thread fuel check valves for select fuel cells

Black anodized finish, made of lightweight 6061 t6 cnc machined billet aluminium alloy

Roll-over valve #8, for select fuel cells, When fitted its stays open which allows the cell/tank to breathe

FITMENT: Perfectly fit for 2003-2010 Ford 6.0L diesel engine

HIGH QUALITY: High Quality CNC Machined from Brass with excellent mechanical and physical properties, this adapter fitting shows its high tightness, corrosion resistance and durability

FEATURES: This fitting with 1/4 Inch OEM Shrader connection fits almost any fuel pressure tester

【100% QUALITY MATERIAL】：The fitting made of T6061 Aluminum,high strength and good durability.The material of union adapter is lightweight aluminum.Working Temperature Range: -65℉ to 252℉ （-53℃ to 122℃).Max Working Pressure: 1000psi.

【EASY INSTALLATION】：Swivel fittings are easy to use and don't require special equipment. These new full flow swivel hose ends swivel to allow for a quick alignment of the hose after assembly.

【WIDELY APPLICATIONS】：6AN swivel hose end 6an hose separator clamp is not disposable, and you can easily reuse them. You can use them for Fuel Line, Oil Hose, Brake Line, Water Pipe, Gas Line and so on.

Edelbrock's R&D staff is not only well qualified at their respective positions, but they're also automotive enthusiasts who do more than work in the automotive aftermarket-they live it-and it's at that point where understanding the inner workings of a supercharger, or an engine, EFI system becomes second nature..Material:Aluminum

Whether they're manifolds, superchargers, fuel injection systems, cylinder heads, nitrous systems, or carburetors, you can rest assured that the final product was directly influenced by the passion for performance that is an integral part of our Edelbrock team.

Every product we design and sell at Edelbrock is tested and approved by Edelbrock engineers in a real world environment on state-of-the-art equipment.

Size: -12 AN (1-1/16 x 12) male weld bung, pack of 2

Material: SUS304 Stainless Steel

MUST BE WELDED

FITMENT - Fit perfectly on 2003 2004 2005 2006 2007 2008 2009 2010 Ford 6.0L diesel engine.

1/4" SCHRADER CONNECTION - This fitting has an OEM 1/4 inch Schrader connection which is the most common connection size for almost any fuel pressure test kit.

EXCELLENT FUNCTION - Low fuel pressure is one cause of premature 6.0L injector failure. This fitting not only makes checking fuel pressure easily, but also boost fuel pressure and increase injector life.

JIC 6 AN female flare 9/16"-18 thread to 3/8 tube hard line pipe hose end fittings adaptor with brass insert

Lightweight 6061 t6 cnc machined billet aluminum, black anodized

Exclusive hard anodized coating; Tube Size 3/8 inch, AN06 female

Package Included: 2PCS 6AN to 6AN Male Flare Coupling Union Adapter

Thread size of 6AN male coupler is 9/18-18 JIC, can use to splice or extend a line, works with female thread fitting.

Work temperature: -65 to +252 degree F. Max pressure: 1000 psi. Ultimate torque: 25N.

Fit Type: Vehicle Specific

For competition applications where reduced weight is needed, use our lightweight ProClassic Crimp-On hose ends.

Every product we design and sell at Edelbrock is tested and approved by Edelbrock engineers in a real world environment on state-of-the-art equipment.

Quick-Connect fit 3/8 fitting.

Barb side fit: 3/8 in Quick Connect Adapters nylon tube

Package Includes: Pack of 2 Fuel Line Quick Connector.

6AN fuel pressure gauge fitting male to female with 1/8" NPT port. Manufactured from lightweight 6061-T6 aluminum

Anodized finish for strength, durability and corrosion resistance

37° sealing angle guarantees a positive seal at maximum operating pressure

Set of fittings to adapt C5 type filter-regulator to AN-6 flare (male).

Includes 3/8" Push On (female), 5/16" Push On (female), and 3/8" Push On (male).

Female adapters are screw-on type that inspire more confidence than the OE style plastic clips.

[Fuel hardline fitting] : Only compatible with hard tube.6AN to 3/8 inch,the thread size of the 6AN is 9/16UNF.It's fits to 3/8" OD hardline,please measure before perchase.

[Material]: Made of aluminium alloy fitting and brass ferrule.Good corrosion resistance. There is no pollution in disposal, which is beneficial to environmental protection.

[Wildly Application]: This 3/8 hardline to 6an fitting is widely used in Brake System / Air & Fuel Delivery/ Engine Modification / Oiling System / Cooling System.

Aluminum,anodized black surface.

Size:Male -10 AN flare to male 3/4" NPT thread oil fuel line connector straight

37° sealing angle and the NPT thread side is sealed by a 60 degree tapered threads.(Note:To ensure no leakage at the NPT end, sealant or PTFE (polytetrafluoroethylene tape) is strongly recommended.)