EVIL ENERGY 6AN Male Flare to M16 x 1.5mm Male Metric

Designed for automotive and hydraulic plumbing where an AN hose or hardline must connect to a metric-threaded port, this compact adapter converts 6AN (9/16-18 UNF) fittings to M16 x 1.5mm while providing a pressure-rated, o-ring sealed joint. Its aluminum alloy construction keeps weight low and resists corrosion, while the included o-ring ensures a leak-resistant interface without additional sealants.

How does this adapter create a leak-resistant connection?

The adapter pairs a 37° flare sealing face on the AN side with an o-ring sealed metric thread on the M16 side. The flare compresses against the mating AN surface while the o-ring sits in the metric port, creating dual sealing points that reduce the risk of fluid escape under pressure.

• 37° flare on 6AN side provides metal-to-metal sealing for flared hose ends.
• NBR rubber o-ring seals the M16 x 1.5 male thread to the receiving port.
• Eliminates need for thread tape or liquid sealants when installed correctly.

What are the performance limits and materials used?

Constructed from 6061-T6 aluminum, the fitting balances strength and light weight for vehicle and equipment plumbing. It’s rated for typical automotive fluid pressures and operates across common temperature ranges for engine-bay use.

• Body material: aircraft-grade 6061-T6 aluminum for corrosion resistance and low mass.
• Seal material: NBR (nitrile) o-ring selected for fuel and oil compatibility.
• Operational range: approximately -20°C to 100°C (-4°F to 212°F) and up to 1500 PSI working pressure.

Which systems and installations is this adapter suited for?

This adapter works well wherever a 6AN line must interface with an M16 x 1.5 port, including fuel systems, oil feed/return lines, transmission coolers and many aftermarket plumbing solutions. It’s intended for fluid-carrying applications rather than structural or high-impact uses.

• Commonly used in fuel lines, fuel filters, and transmission oil cooler fittings.
• Suitable for aftermarket fuel-return setups and oil cooler hookups on cars, motorcycles, and small trucks.
• Not intended as a pressure safety device or for extreme vibration without proper support.

How do I install and maintain the adapter for best results?

Installation requires mating the AN flare to its counterpart and threading the M16 male into the receiving port until the o-ring compresses. Torque to manufacturer recommendations for your system and inspect the o-ring and threads for wear during routine maintenance.

• Inspect the o-ring for cuts or hardening before assembly; replace if damaged.
• Hand-start threads to avoid cross-threading, then tighten to specified torque values.
• Use a light coat of compatible oil on the o-ring if dry to ease installation and protect the seal.

Who this adapter is for: mechanics, performance tuners, and DIYers who need a reliable, lightweight transition between AN hoses and metric ports will appreciate this EVIL ENERGY adapter. It’s aimed at automotive and powersports applications where compact, pressure-rated fittings are required to link aftermarket lines to factory or metric components.