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NPT (national pipe taper) Male to AN Male Adapter fitting
  • NPT (national pipe taper) Male to AN Male Adapter fitting
NPT (national pipe taper) Male to AN Male Adapter fitting

NPT (national pipe taper) Male to AN Male Adapter fitting

$7.99 USD
Free Shipping $99+Free Shipping $99+ Lifetime WarrantyLifetime Warranty Expert SupportExpert Support

NPT to AN Adapter Fittings

NPT to AN Adapter Fittings — Reliable Fuel & Oil Connections

Convert traditional NPT (National Pipe Thread) ports on fuel pumps, sending units, fuel rails, and regulators to precise AN (Army-Navy) flare connections. These adapters deliver a secure, leak-resistant interface that stands up to high pressure and vibration in performance builds and racing environments.

Crafted from durable, corrosion-resistant anodized aluminum in a sleek black finish and available in straight, 45°, and 90° angles to fit tight engine bays and custom layouts.

Key Benefits

  • Fast conversion: Bridge NPT ports to AN flare systems across fuel and oil plumbing.
  • Leak-resistant: AN 37° flare seals metal-to-metal; NPT side threads with sealant.
  • Built to last: CNC-machined anodized aluminum resists corrosion and harsh conditions.
  • Angles for any layout: Straight, 45°, and 90° options simplify routing.

Technical Specs

Thread Type (Side A) AN male, 37° flare (no sealant required)
Thread Type (Side B) NPT male, tapered thread (use thread sealant)
Material Anodized aluminum
Finish Black anodized, corrosion-resistant
Available Angles Straight, 45°, 90°
Typical Applications Fuel pumps, sending units, fuel rails, regulators, custom EFI plumbing
Sealant Note Apply Teflon thread sealant on the NPT side ONLY. Do not use on AN flare.

Why Convert NPT to AN?

NPT seals via tapered threads and sealant—effective, but prone to loosening under vibration. AN uses a repeatable 37° flare for a robust metal-to-metal seal. With these adapters, you keep existing NPT ports while stepping up to leak-tight AN plumbing for modern EFI performance.

Recommended Pairings

Install Tip

Important: Apply Teflon thread sealant to the NPT side only. Do not use sealant on the AN flare. Tighten to snug plus a quarter-turn; do not over-torque.
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FAQ

Do I need thread sealant on both sides?

No. Use Teflon thread sealant on the NPT side only. The AN side seals via a 37° metal-to-metal flare.

Can I use these with PTFE braided hose?

Yes. These adapters connect NPT ports to AN hose ends, including PTFE AN hose systems.

  • 5 stars: 34 (97%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 1 (3%)
P
Porter Mackenzie
Perfect fitting for my install

This allowed me to connect my new fuel lines to my new Tanks Inc. fuel sending unit. Fittings were perfect. Very happy.

Porter Mackenzie review photo
z
zachary barker

I never got them.. no tracking, no communication.. I even emailed the customer care link and still get nothing.. iv ordered a lot from this company with no issues but the last year it has really gone downhill.. disappointing because there products are nice are really look great and work well.. so unfortunately a one star.. it’s been over a month and no communication on where the fittings are

D
DWAYNE A OPPERMAN SR

It’s perfect

Thank you for your positive feedback, we appreciate your support!

b
bobby beck
NPT to AN fitting

perfect fit, no leaks.

Good morning, thank you for your feedback. We appreciate the support. Please don't hesitate to contact us if you have any other questions or concerns.

P
Patricia Wiers
Cool stuff

Easy to assemble with the correct tools. I really like how they work and look.

C
Chuck Sullivan
Efi fuel line set up

I ordered a full fuel line kit for my efi small block going in my car. They took all of my information for my set up and then sent me the recommendation on parts needed. Great experience and customer service in my eyes the way my needs were met.

T
Tim a Janczak
Tim

Good product
They get it right out
Great service

M
Marvin Bustos
Adapter fitting review

Adapter was good quality, worked flawlessly, and was delivered in a timely manner.

r
robin ray
Love hot rod hose !!

Am unsure if this is the fitting for the fuel pump or the fuel filter. Dumbasses like me need to know !

J
Jeff Cross

Worked perfectly.

S
Samuel Bérubé
good quality and super service

awsome product

K
Kyle Ward
Great products!

Everything i have ordered from Hot Rod Fuel Hose has been as described and great quality. Will be ordering again for the next project.

D
David Lieberman
Great parts and great firm!

I’ve ordered PTFE hose and fittings for restoration of my ‘53 Ford F-100. They actually sent me Thank You messages! Who does that??!! All my parts were delivered quickly and have functioned flawlessly.

C
Charles West
Great parts!

Great parts!

M
Michael Murphy
quality parts!

quality parts!

P
P.K. Smith
Rat rod

Worked out great just what I needed

K
Kris O Smith
Exactly what I needed and

Exactly what I needed and came very quickly

M
Mark Bloomquist
thanks for speedy return of

thanks for speedy return of my money

R
Ryan Scharf
Perfect

Worked perfect-thankyou

M
Mike Mc Norton
EXCELLENT!!!

EXCELLENT!!!

P
Patrick Matthews
Great quality. Shipped fast

High quality

R
Rick
Hose , fittings

Great Product leak proof and Beautiful

D
David Shelton
Dave Shelton

Quality products, great value, and superior customer service. Very highly recommended and would definitely purchase again!

R
Rick Shrum
As Described.

As Described.

J
Jason Powell
Awesome

Awesome

V
Victor Meyer
Nice looking parts

Thanks for the great parts and fast service. Looking forward to installing them on my 1972 roadrunner.

M
Michael Baresi
Excellent quality and excellent

Excellent quality and excellent

K
Keith Casey
Excellent quality fittings as well

Excellent quality fittings as well as great customer service and shipping.

J
Jeremy Brinkerhoff
Great product and customer service.

Great product and customer service.

M
Martin Basquez
Good product

Good product

B
Benjamin Ribaudo
Hot rod fuel hose

Great products!!!

D
David Holt
Great stuff

Great stuff

C
Charlene Childers
Nice neat clean install !

Nice neat clean install !

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