AN Male to NPT Male Adapters - Stainless Steel

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AN Male to NPT Male Adapters - Stainless Steel

Connect a compatible female AN connection to a female NPT port with our AN Male to NPT Male Adapters - Stainless Steel. Available with an AN3 or AN4 convex male connection and a 1/8"-27 NPT male thread, these compact adapters provide a durable transition between two different connection and sealing systems.

Why Choose Our Stainless Steel AN Male to NPT Male Adapters?

AN to NPT Conversion

Provides a straightforward transition from an AN3 or AN4 female connection to a 1/8"-27 NPT female port.
Convex AN Male Connection

The AN side uses a convex male sealing seat designed to mate with a compatible female connection.
1/8"-27 NPT Male Connection

The tapered NPT thread seals within a compatible 1/8"-27 NPT female port using suitable thread sealant.
303/304 Stainless Steel

Offers excellent strength and durability for demanding automotive and motorsport applications.
Natural Stainless Steel Finish

The corrosion-resistant natural finish requires no additional coating and provides a clean, durable appearance.
Precision CNC Machined in the UK

Manufactured in the United Kingdom for accurate thread form, sealing geometry and consistent fitment.

Different Sealing Methods at Each End

The AN and NPT connections seal differently. The AN side seals against its mating seat and does not require thread sealant, while the tapered 1/8"-27 NPT connection seals through the thread and should be installed using a suitable thread sealant.

Adapter Type: AN Male to NPT Male Adapter Connects compatible AN and NPT connections
Material: 303/304 Stainless Steel Excellent strength and durability
Finish: Natural Stainless Steel Corrosion-resistant
Manufactured In: United Kingdom Precision CNC machined
Reusable: Yes Provided the threads and sealing surfaces remain undamaged

Connection: AN Male - Convex For a compatible female mating connection
Thread Type: Straight UNF Thread provides retention rather than the fluid seal
Sealing Method: Convex Mating Seat No thread sealant required

Connection: Male NPT For a compatible female NPT port
Thread Type: Tapered NPT Thread provides the fluid seal
Sealing Method: Thread Seal Use suitable thread sealant

Available stainless steel AN male to NPT male adapters
Product Code	AN Connection	NPT Connection
ADP-MM-NPT-SS-AN3CVX-18NPT	3/8"-24 UNF Convex Male AN3	1/8"-27 NPT Male
ADP-MM-NPT-SS-AN4CVX-18NPT	7/16"-20 UNF Convex Male AN4	1/8"-27 NPT Male

Check both connections before ordering. The AN connection seals against its mating seat, while the 1/8"-27 NPT connection seals on the tapered thread and requires suitable thread sealant.

Brake Systems
Clutch Systems
Fluid Components
Sensor Ports
Custom Hose Installations

Free repair or replacement for two years from the date of purchase. Learn more

Frequently Asked Questions

What are AN male to NPT male adapters used for?
They provide a transition between a compatible female AN connection and a female 1/8"-27 NPT port. They are available with either an AN3 or AN4 male connection.
What AN sizes are available?
Choose from AN3 with a 3/8"-24 UNF convex male connection or AN4 with a 7/16"-20 UNF convex male connection. Both versions have a 1/8"-27 NPT male connection at the opposite end.
How does the AN connection seal?
The AN connection seals against the compatible mating seat. The straight UNF thread provides retention rather than the fluid seal.
How does the NPT connection seal?
The 1/8"-27 NPT connection uses a tapered thread that creates the fluid seal as it engages with a compatible female NPT port. Suitable thread sealant should be used during installation.
Should I use thread sealant on both connections?
No. Suitable thread sealant should be used on the tapered NPT connection only. The AN connection seals against its mating seat rather than on the thread.
Is 1/8" NPT the same as a 1/8" parallel thread?
No. 1/8"-27 NPT is a tapered pipe thread and should only be installed into a compatible NPT connection. It is not interchangeable with similarly sized parallel threads.
What are the adapters made from?
They are precision CNC machined from 303/304 stainless steel for excellent strength and durability.
Where are these adapters manufactured?
They are precision CNC machined in the United Kingdom.
Are these adapters reusable?
Yes. They can be removed and reused provided the threads and sealing surfaces remain clean and undamaged.