AN, ORB, and NPT Fitting Caps & Plugs

Seal, store, or block off with confidence using our precision-machined AN, ORB, and NPT Caps & Plugs. Whether you're sealing a fuel rail, capping a pump outlet, or storing an open AN line, these plugs deliver secure, leak-free performance for any project or storage situation.

Universal Fit for Performance Plumbing

These fitting plugs and caps are a must-have for any professional builder, DIYer, or trackside toolkit. Designed to fit a variety of fuel system ports and AN hose ends, they help protect your components from dirt, debris, or fuel leaks during builds, maintenance, or transport.

Available Sizes:

• AN Caps & Plugs: -6AN, -8AN, -10AN
• ORB Plugs: ORB-6, ORB-8, ORB-10
• NPT Plugs: 1/4" NPT, 3/8" NPT, 1/2" NPT

Common Uses:

• Sealing unused fuel rail ports
• Capping EFI fuel pump or regulator outlets
• Blocking off oil cooler ports or transmission fittings
• Storing AN hose ends without fluid leaks
• Pressure testing or temporarily capping lines

Key Features:

• Compatible with AN, ORB (O-Ring Boss), and NPT fittings
• Made from high-quality aluminum with a black anodized finish
• Reusable and perfect for mockup, test-fit, or permanent use
• Precision threads ensure leak-free sealing
• Great for race, street, off-road, and marine applications

Why Choose Hot Rod AN Fitting Caps & Plugs?

Unlike cheap plastic plugs or makeshift caps, these purpose-built aluminum fittings ensure a perfect seal every time. Whether you're prepping a vehicle for storage, capping off during plumbing changes, or keeping your build clean and safe, these fittings offer unmatched convenience and reliability.

Shop Related Products:

• AN Adapter Fittings
• AN PTFE Hose End Fittings
• Installation Tools
• Hose & Fitting Bundle Kits

Need Help Picking the Right Plug or Cap?

If you're unsure which fitting type or thread size you need, we're here to help. Use our Fuel System Build Request Form or Contact Us for expert guidance and quick answers.