Custom adapters
AN to NPT adapters, machined to order
One machined part that connects AN 37° flare to NPT in the exact sizes you need, instead of a stack of off the shelf adapters. Pick the shape, material and finish, see the price as you go, and get it in 2 weeks.
Common sizes
Straight adapters in 6061-t6 aluminum, priced each at 10 pieces. Any size is available on either end, and you can change the shape, length, bore and material in the builder.
| AN end | NPT end | Rated to | Each at 10 | |
|---|---|---|---|---|
| -4 AN male | 1/8 NPT male | 2,250 psi | $40.01 | Build this |
| -4 AN male | 1/4 NPT male | 2,250 psi | $40.01 | Build this |
| -5 AN male | 3/8 NPT male | 2,250 psi | $40.01 | Build this |
| -6 AN male | 3/8 NPT male | 2,250 psi | $40.01 | Build this |
| -8 AN male | 1/2 NPT male | 2,020 psi | $40.01 | Build this |
| -10 AN male | 3/4 NPT male | 1,570 psi | $40.01 | Build this |
| -12 AN male | 3/4 NPT male | 1,570 psi | $40.01 | Build this |
| -16 AN male | 1 NPT male | 1,350 psi | $40.01 | Build this |
| -20 AN male | 1 1/4 NPT male | 1,120 psi | $40.01 | Build this |
| -24 AN male | 1 1/2 NPT male | 900 psi | $40.01 | Build this |
Ratings are for 6061-t6 aluminum at room temperature, limited by the lower rated end. Single parts start at $120.
About AN
The military and aerospace 37° flare that motorsport fuel, oil and coolant plumbing is built on. AN fittings share the 37° seat and UNF thread sizes with JIC, so a -6 AN mates with a -6 JIC, but the threads are held to the tighter class 3A and 3B. Usually 6061 aluminum, anodized red, blue or black.
AS4395, MS33656 37° flare (AN). Seals by: 37° flare metal seat, class 3a/3b thread.
About NPT
American tapered pipe thread. The taper wedges tight and seals on the thread flanks with sealant or PTFE tape. Found on pumps, compressors, gauges, valves and general plumbing across North America.
ASME B1.20.1. Seals by: taper, sealant or ptfe tape.
One part, fewer leaks
A single machined adapter replaces a stack of two or three, so there are fewer joints to leak and the run is shorter and lighter.
Any shape
Straight, 45°, 90°, street 90, tee, Y, cross or a manifold with up to 8 outlets. Stainless, steel, brass, aluminum or engineering plastics.
Checked before it ships
Threads are checked with go and no-go gauges and every order ships with a certificate of conformance. Pressure test reports on request.
Questions
What pressure is an AN to NPT adapter rated for?
It depends on the size and material. In 6061-t6 aluminum, the common sizes on this page are rated from 900 to 2,250 psi, set by the lower rated end. The builder shows the exact rating for your part, including a wall thickness check.
Can I get an AN to NPT adapter as an elbow or tee?
Yes. Choose straight, 45°, 90°, street 90, tee, cross or a manifold, then set the length, bore, material and finish. The price and pressure rating update as you design.
How many do I have to order?
There is no minimum. Single parts start at $120, pairs at $55 each, and the price per part drops as quantity goes up.
How fast will it ship?
Standard orders ship in 2 weeks. 1 week and 3 day delivery are available. Every thread is gauged, and every order ships with a certificate of conformance.
Related adapters
Need a size or shape not listed?
Every combination of 29 standards is available in the builder.
Open the builder