EVIL ENERGY 10AN Female to 12AN Male Flare Reducer Expander

EVIL ENERGY's AN12 male to AN10 female flare adapter is a precision-machined reducer/expander that lets you join AN12 lines to AN10 components reliably and leak-free.

When modifying fuel, coolant, or EFI plumbing you often face mismatched AN sizes. This two-piece set from EVIL ENERGY provides a compact, high-strength solution that adapts an AN12 male fitting to an AN10 female port (11/16-12 UNF to 7/8-14 UNF) while preserving the standard 37° flare seal. Built from 6061-T6 aluminum with a black anodized finish, these adapters are designed for workshop use on swaps, turbo setups, EFI systems, and custom fuel rails where space and reliability matter.

How does this adapter keep fuel or coolant lines sealed?

The adapter uses the standard 37-degree AN flare mating surface to form a metal-to-metal seal when tightened to spec. That flare interface is the same system used across aerospace and performance plumbing, so it avoids soft-seat failures and remains serviceable.

• 37° flare sealing on the AN flare side for dependable metal-to-metal contact.
• Precision threads (AN10: 7/8-14 UNF, AN12: 11/16-12 UNF) for accurate engagement.
• Black anodize adds corrosion resistance and reduces galling during installation.

What materials and temperature/pressure limits should I expect?

EVIL ENERGY machines these fittings from aircraft-grade 6061-T6 aluminum and applies a protective black anodized finish. They handle typical automotive liquids under substantial pressures and a wide temperature range, making them suitable for most performance applications.

• 6061-T6 aluminum body for strength and light weight.
• Maximum working pressure rated at 1500 PSI for high-demand systems.
• Operating temperature range from -65°F to 252°F for varied environments.

Will these adapters fit my project and how are they used?

These are dedicated AN threads: the female end accepts AN10 components, while the male end threads into AN12 ports. They are ideal when you need to step down or step up between these common fittings without rerouting or custom hardline work.

• Male AN12 threads into AN12 ports or hoses with AN12 female ends.
• Female AN10 receives AN10 male fittings or hose ends with a 37° flare.
• Commonly used in fuel systems, cooling lines, EFI installs, and LS swap plumbing.

How do I install and maintain these adapters safely?

Installation is straightforward: ensure mating surfaces are clean, hand-start threads to avoid cross-threading, then torque to appropriate AN torque values or use an adapter-specific recommendation. Periodic visual inspection for leaks, corrosion, and thread condition keeps systems reliable.

• Clean flare and threads before assembly to prevent leaks.
• Hand-start threads and tighten with appropriate wrenches, avoiding over-torque.
• Inspect under pressure for leaks and re-torque if necessary after initial run time.

Who is this for: These EVIL ENERGY AN12-to-AN10 adapters are aimed at mechanics, tuners, and DIY performance enthusiasts who need a compact, robust way to adapt between common AN sizes. They suit anyone performing fuel system upgrades, turbo or EFI plumbing, LS swaps, or custom braided-line assemblies who wants dependable metal flare sealing and a high-strength, lightweight aluminum fitting. Each package includes two adapters so you can outfit multiple connections or keep a spare on hand.