Best Union Fuel System Fittings in 2026

Handy brass fittings can be used on electric fuel pumps and regulators

Fit type: Vehicle Specific

Package Dimensions: 11.938 H x 2.54 L x 7.874 W (centimetres)

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

For use with some regulators

Connect a 1/4" inverted flare pigtail to a regulator with 1/4" female NPT port(s)

Sold brass construction

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

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

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

Compatible with Ethanol Blended Fuels - Engineered low permeation material which prevents fuel evaporation. Not mention, suitable for Boats, RVs, Tractors, and Caravan

Easy Installation with 2-prong clip style tank connector, 1/4 inches NPT

Built with Durable materials for marine environment

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

This Five Oceans Fuel line connector can be installed with confidence using our pipe-to-hose fittings.

Perfectly crafted for fuel systems, these pipe hose fittings are the ideal use for any portable tank.

This machined brass fitting features a male 1/4 inches NPT thread and sharp-edged barbs for 5/16 inches hose to provide excellent grip. Brass construction resists corrosion.

[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.

Available in diverse styles, including tees, elbows and connectors

Conveniently packaged in a variety of piece counts to assist with both small and large projects

Corrosion-resistant brass design

Fitment--Adapter fitting compatible with 2003-2007 Ford Super Duty 6.0L Power Stroke

Feature--With 1/4 Inch OEM schrader valve connection fits almost any fuel pressure tester

Function--The pressure test fitting will help you easily connect a standard fuel pressure gauge to fit for 6.0L Powerstroke

Material : Brass

Hose Barb End : 3/8"

Tube Compression End: 3/8” Tube O.D.

Material: High quality brass material with Nickel plating against corrosion

Working Pressure: 200 psi Maximum working pressure

Sealing: Double O-ring ensure 100% sealing in high working pressure

Size: 6AN(9/16" x 18) female thread to 3/8" (9.5mm) hardline

Surface treatment: Black anodized finish for durability and strength

Material: Manufactured from high performance lightweight 6061-T6 CNC machined aluminum material with brass ferrule

Available in diverse styles, including tees, elbows and connectors

Conveniently packaged in a variety of piece counts to assist with both small and large projects

Corrosion-resistant brass design

9/16-24" male thread attachment

5/16" smooth hose attachment

Made of brass with gold irridite finish

90° streamline fuel line fittings are manufactured of brass and provide a quick, easy fuel hose connection

Streamline fittings offer the racer improved fuel flow to the carburetor over the right angle fittings more commonly available

One per package

3/8-Inch National Pipe Thread Brass with 2 Hose Clamps Fittings — NPT For Fuel Pumps Regulators Propane Hose and Fuel Pressure Gauge, 4-Piece Set

Compatibility — Suitable to use with regulators and mechanical fuel pumps

Durable Material — Made from premium quality brass that can withstand corrosion and extended use

Available in diverse styles, including tees, elbows and connectors

Conveniently packaged in a variety of piece counts to assist with both small and large projects

Corrosion-resistant brass design

【SOLID BRASS MATERIAL】Barb fitting is made of brass. Strong and durable, not easy to rust and corrode. Has a long service life. NOTE: Brass barb hose fitting is not suitable for potable water.

【-65~250°F 150PSI】Hose barb fitting has strong temperature resistance and good pressure resistance. So barb union splicer fitting is often used for water, fuel, oil delivery.

【PACKAGE CONTAINS】1/4'' hose ID barb fitting (4 PCS) + 304 stainless steel hose clamp (8 PCS). You don't need to buy additional accessories.

【SOLID BRASS MATERIAL】Barb fitting is made of brass. Strong and durable, not easy to rust and corrode. Has a long service life. NOTE: Brass barb hose fitting is not suitable for potable water.

【-65~250°F 150PSI】Hose barb fitting has strong temperature resistance and good pressure resistance. So barb union splicer fitting is often used for water, fuel, oil delivery.

【PACKAGE CONTAINS】5/8'' hose ID barb fitting (3 PCS) + 304 stainless steel hose clamp (6 PCS). You don't need to buy additional accessories.

【Upgraded Hose Barb Kit】 : 12 air hose adapters with sealant and 12 hose clamps; 3/8" Barb X 1/4" Male NPT

【Improved Threaded End】 : Coated the male end with select sealant to a snug fit for creating an air tight environment. You can be relieved from the preparation of the sealing tape.

【 High-quality Hose Clamps】 : Stainless products can be rustproof. With the hose end applied a clamp, it can help bite and lock the pipe more tightly. They wont break easily and the flexible long belt can be adjusted to your pipe's size.

【SOLID BRASS MATERIAL】Barb fitting is made of brass. Strong and durable, not easy to rust and corrode. Has a long service life. NOTE: Brass barb hose fitting is not suitable for potable water.

【-65~250°F 150PSI】Hose barb fitting has strong temperature resistance and good pressure resistance. So barb union splicer fitting is often used for water, fuel, oil delivery.

【PACKAGE CONTAINS】5/16'' hose ID barb fitting (4 PCS) + 304 stainless steel hose clamp (8 PCS). You don't need to buy additional accessories.

High Quality: Made of high strength premium brass for corrosion and wear resistance, high temperature ductility and low permeability, T-shaped brass barbs and thickened walls for greater strength and very strong.

Hose Clamp: All parts of the pipe clamp are made of 304 stainless steel, which will not rust, the pipe clamp can form a tight seal on the flexible or semi-rigid hose and can be used for a long time.

Easy to use: T-shaped hose barbs can be solidly connected to the hose, (suitable for hoses with an inner diameter of 10mm), you need to install it yourself in a few minutes, the installation is quick and easy.