AN Bulkhead Fittings with Nylon Crush Washers – Add a Return or Pickup Line with Confidence

Upgrading your fuel system? Whether you're adding a return line for EFI or installing a pickup for an inline fuel pump, these AN bulkhead fittings with PTFE nylon crush washers are the cleanest and most reliable way to get it done right.

Perfect for fuel tanks or fuel cells that lack built-in provisions, these bulkhead fittings create a secure, leak-free seal when mounted on a flat surface. The included PTFE crush washers are fuel-safe and designed to hold up under pressure – ideal for modern EFI and LS swap fuel systems.

Why Use These Bulkhead Fittings?

• Add a Return Line – Retrofit your fuel tank or cell when your sending unit doesn't include a factory return.
• Install an Inline Pump Pickup – Add a dedicated feed line from your tank for an inline fuel pump system.
• Fuel-Safe PTFE Crush Washers – Reliable sealing even with ethanol, E85, and race fuels.
• Clean, Professional Installation – Avoid welding or modifying your sending unit. Just drill, seal, and connect.

Inline Fuel Pump Mounting Tips

• Mount the pump as low and as close to the tank as possible to help with fuel priming and reduce the chance of cavitation.
• Gravity-fed setups improve pump longevity and performance.
• Use a pre-filter between the tank and pump to protect the system.
• Pair your pickup bulkhead with a straight or 90-degree AN fitting depending on your routing needs.

Ideal for LS Swaps, EFI Conversions, and Performance Builds

Whether you're swapping an LS into a squarebody C10 or converting your carbureted setup to EFI, these bulkhead fittings are essential for adding the feed and return lines your system needs. They’re also a clean solution for race cars running inline fuel pumps with external pickup points.

Recommended Add-Ons:

Tech Specs:

• Material: Aluminum Bulkhead + PTFE/Nylon Crush Washers
• Size Options: AN6, AN8, AN10
• Fuel Compatibility: Gasoline, E85, Ethanol, Diesel
• Washer Type: PTFE (single use)
• Applications: Return lines, pickups, vent lines

Common Applications

• Adding a return line to fuel tanks or fuel cells
• Creating a pickup for inline fuel pumps
• Fuel system upgrades for EFI swaps and LS engines
• Race, off-road, and performance builds

These bulkhead fittings are a must-have for anyone designing a clean and effective AN fuel system. Simple to install and built to last, they ensure your return or pickup line is sealed tight and ready to flow.

Need Help Planning Your Fuel System?

Contact us or fill out our fuel system build request form and let our team help you design the right setup for your vehicle.