Fuel Line Connectors & Hose Fittings

What Types of Fuel Line Fittings Are Available?

You'll find every major fuel fitting style here, each built for a specific type of connection and pressure. The right choice depends on how your lines route and what components you're joining.

These are the core fuel line fittings and adapters you can shop by type:

• AN fittings: Army-Navy fittings with a 37-degree flare for leak-free, reusable connections on braided and PTFE hose.
• Quick-connect fittings: push-to-connect designs that speed up assembly and service on OE-style lines.
• Hose barb fittings: ribbed ends that grip rubber or nylon hose with a clamp for low-pressure runs.
• NPT adapters: tapered pipe-thread fittings that connect to pumps, rails, and regulators.
• Bulkhead fittings: pass-through fittings that seal a line where it crosses a panel or tank wall.

Ready to buy? Browse fuel line fittings and adapters by type, and if you're new to AN ends, read how to assemble AN fittings and hose assemblies before you start.

Understanding Fuel Line Fitting Sizes and Threads

AN sizing is simple once you know the rule: the AN number equals how many 1/16-inch increments make up the hose inside diameter. A -6 AN fitting equals 6/16", or 3/8", so the number tells you the bore, not the thread. That makes it easy to match a fitting to the hose you already run.

NPT is different. It's a tapered pipe thread that wedges tighter as you tighten it, sealing against pumps, filters, and regulators that use pipe ports. Because AN and NPT threads don't interchange, fuel line adapters let you step cleanly between the two systems.

Most street and performance fuel systems run common fuel line sizes like 5/16" and 3/8", which line up with -5 and -6 AN. Bigger builds and forced-induction setups often move up to -8 AN or larger to feed the added flow. For the full breakdown, check our guide to AN fitting and hose sizes and match every line on your car.

Fuel Lines, Hoses, and Complete Line Kits

Your line choice comes down to fuel type, pressure, and how the run is exposed. JEGS carries braided fuel line, nylon tubing, PTFE-lined hose, pre-bent OE-style steel and stainless lines, and complete kits, so you can match the line to the job.

Braided stainless steel hose resists abrasion and high-pressure fuel, which makes it a strong pick for EFI and forced-induction builds. Nylon tubing is light and flexible for low-pressure return and vent lines. PTFE-lined hose handles ethanol blends and modern fuels that break down standard rubber.

If you'd rather not measure and bend from scratch, pre-bent lines and complete fuel line kits give you a ready-to-install path with the fittings included. Browse our fuel lines and line kits to find the material and length your project needs, then add the adapters to finish the run.

Fuel Distribution Blocks, Hardware, and Retainers

Once your main lines are set, distribution blocks and hardware keep everything organized and secure. These parts split flow, mount your lines, and lock quick-connect ends in place so the whole system stays tidy and leak-free.

Fuel distribution blocks take a single feed and split it to multiple outlets, which is handy for dual-carb setups or feeding several injectors from one line. Shop our fuel distribution blocks to balance flow across your system without extra plumbing.

Fuel line hardware and retainers cover the clips, clamps, brackets, and O-rings that hold lines in place and keep connections tight. Grab the fuel line hardware and retainers you need so nothing rubs, rattles, or leaks on the road. To see how these parts fit the bigger picture, start from the Fittings & Hose category and shop the full plumbing lineup.

Which Fuel Line Fitting Brands Does JEGS Carry?

JEGS stocks fuel line fittings from trusted performance-plumbing brands, so you can build with parts that fit and seal as designed. Each brand has a focus, which makes it easier to match parts to your project.

Earl's Performance Plumbing offers a deep catalog of AN fittings, adapters, and hose for street and race builds. Jiffy-tite specializes in quick-connect fuel line fittings that make assembly and service fast without sacrificing a secure seal. Fragola Performance Systems rounds things out with AN fittings, hose ends, and adapters engineered for high-pressure fuel and demanding setups.

Mixing brands is fine as long as the AN sizes and thread types match across every connection. Pick the brand that fits your budget and system, then add the fittings, lines, and hardware you need to complete your order and finish the run.