Didn’t get to select L or R side when ordering.
Didn’t get to select L or R side when ordering.
The hose and fittings are nice quality. Their ability to get stuff shipped out quickly dose not happen.
It took a week to get my order to shipping.
Skip to product information
AN Tube Nuts and Sleeves
$6.99
Reliable shipping
Flexible returns
AN Tube Nuts and Sleeves – Adapt Hardline to AN Plumbing
Upgrade your hardline setup with precision-fit AN Tube Nuts and Sleeves. Whether you're building a custom fuel system, transmission cooler lines, or plumbing for an LS swap, these components allow you to convert standard hardline to AN fittings for a clean, leak-free installation.
What Are AN Tube Nuts and Sleeves?
AN tube nuts and sleeves are used to adapt metal tubing—such as steel, copper, or aluminum hardline—to AN-style fittings. This setup allows you to integrate hardline sections into a flexible AN fuel or fluid system without sacrificing performance, reliability, or appearance.
These fittings are ideal for:
- Fuel lines
- Transmission cooler lines
- Oil system plumbing
- EFI and LS swap fuel systems
IMPORTANT:
- Tube Nuts and Tube Sleeves are sold separately. Be sure to order the correct quantity of each component for your build.
- A 37° flaring tool is required to properly flare the hardline before installing these AN fittings.
Available Sizes:
| AN Size | Tube Size | Quantity |
|---|---|---|
| -6 AN | 3/8" | 2 |
| -8 AN | 1/2" | 2 |
| -10 AN | 5/8" | 1 |
Why Use AN Tube Nuts and Sleeves?
- Connect hardline to AN fittings for seamless integration
- Ensure leak-free performance in high-pressure systems
- Maintain a professional and clean engine bay appearance
- Great for retrofits, EFI conversions, and custom plumbing builds
Recommended Tools and Add-Ons:
- AN Hose & Fitting Installation Tools
- AN Adapter Fittings
- PTFE Hose End Fittings
- Hardline Tube to AN Adapters
Perfect for LS Swaps & Performance Builds
AN tube nuts and sleeves are widely used by professionals and DIY builders alike for connecting hardline fuel or fluid runs in LS engine swaps, EFI conversions, or classic car upgrades. With the right flare tool and proper installation, these fittings will ensure a strong, safe, and sleek-looking connection every time.
Need Help with Hardline Plumbing?
If you're unsure what you need for your specific setup, we're here to help. Reach out through our Fuel System Build Request Form or Contact Us for personalized guidance.