NPT Fittings

Our factory manufactures NPT thread fittings

  • International Standard Thread
  • 20 Years Experiences
  • Quicker Delivery Time
  • Various Sizes
  • Competitive Price

NPT Fittings

NPT is an acronym for National Pipe Taper. NPT fitting is a standardized fitting that is used for connecting pipes for fluid and gas applications. Our NPT fittings follow the technical standards provided by the American National Standard Pipe Thread standards, which are called national pipe threads.

NPT Fittings are available in carbon steel, brass, or stainless steel material for low and high pressure. NPT Fittings sizes range from 1/8” to 2” up on your request. NPT threads are all checked with calibrated gauges during the manufacturing process in compliance with the international thread standard.

Our factory offers high-quality NPT fittings including nipple, male/female elbow, male / female tee, plug, male / female cross, and other NPT thread fittings.

Choose NPT fittings according to your project requirements, contact us now!

Male Thread Elbow
Male NPT Thread Elbow

Product Name: Male NPT thread elbow

Material: carbon steel, brass or stainless steel

Size: 1/8”-2 1/2”

Accept OEM service

One Side Male Thread Nipple
Male NPT Thread Nipple

Product name: Male NPT Thread Nipple

Single male thread or double male thread is available at your request

Size: 1/8”-2 1/2”

Accept OEM service

Male thread plug
Male NPT Thread Plug

Product name: Male NPT thread plug

Type: Hollow plug or dead plug is available at your request.

Size: 1/8”-2 1/2”

Accept OEM service

Male Thread Nipple
Male Hex Nipple

Product Name: Male Hex Nipple

Type: Hex

Material: Carbon steel, stainless steel 304, 316

Size: 1/8”-2 1/2”

Female Thread Tee
Female NPT Tee

Product Name: Female NPT Tee

Material: Stainless steel 304, 316, carbon steel

Size: 1/8”-2 1/2”

Accept OEM service

Female Elbow
Female NPT Elbow

Product Name: Female NPT Elbow

Size: 1/8”-2 1/2”

Material: Stainless steel 304, 316, carbon steel

Accept logo printing on it

female cross
Female NPT Cross

Product name: Female NPT cross

Size: 1/8”-2”

Type: Forged

Material: stainless steel 304, 316, carbon steel

male and female tee
Male and Female Tee

Product name: male and female tee

Size: 1/8”-2”

Type: forged

Material: Stainless steel 304, 316, carbon steel

male and female elbow
Male and Female Elbow

Product name: male and female elbow

Type: forged

Pressure: 3000-6000psi

Material: Stainless steel 304, 316, carbon steel

Reducing Nipple
Reducing Nipple

Product name: reducing nipple

Type: hex

Pressure: 3000-6000psi

Material: Stainless steel 304, 316, carbon steel

dead plug
Dead Plug

Product name: dead plug

Type: hex

Thread: NPT female thread

Material: Stainless steel 304, 316, carbon steel

hex plug
Hex plug

Product name: hex plug

Thread: NPT male thread

Type: hex

Material: Stainless steel 304, 316, carbon steel

12 Products Found.

NPT Fittings Feature Box

Standard NPT Thread

NPT thread conforms to international standards

materials choices
Several Materials

Several materials are available

oem service
OEM service

Accept OEM service

High pressure
Higher Pressure

NPT Fittings can stand higher pressure

NPT Fittings Materials

Our factory can manufacture NPT fittings in different materials including stainless steel 304, 316, brass, carbon steel, and some special materials like Monel, Alloy, and so on. You can choose materials according to your project requirements

Our factory offers MTC(Material Test Certificate) for you to test NPT Fittings pressure.

If your project environment is generally corrosive and requires high pressure and temperature, it is better to choose stainless steel 304 or 316. The temperature range is -245℃ to 649℃.

Brass materials are suitable for non-corrosive water, especially for drinking water. And they are suitable for low pressure. Temperature: -54℃ to 204℃

If your project is about grease in a non-corrosive environment and requires a low budget, suggest you choose carbon steel materials. Temperature: -29℃ to 427℃

If your project application is in strong corrosive environments like seawater, hydrofluoric acid, and HF acid plants, advise you choose special materials.

NPT Fittings Materials
npt fittings sizes and types

NPT Fittings Sizes And Types

Our factory manufactures types of NPT fittings including Nipples, Bushes, Couplings, Plugs, Crosses, Caps, Unions, Elbows,  Tees, Branch, and so on.

NPT fittings sizes are commonly 1/8”, 1/4”, 3/8”, 1/2”, 3/4”, 1”, 1 1/4”, 1 1/2”, 2”, 2 1/2”.

Be careful to choose a thread size, you have to consider both the TPI and OD of the thread. As some sizes have the same TPI, so you have to measure the OD of NPT fittings to determine accurate NPT fittings sizes.

Use Thread Gauge To Measure NPT Thread

In our production shops, our workers measure every male or female thread of NPT fittings by the thread gauge when fittings are made from the lathes to check whether threads are acceptable.

Thread Gauges for NPT fittings

Accept Custom-made Service

Our factory accepts custom-made service. You can send your drawings or samples of NPT fittings, we will manufacture them following your requirements.

You can also print your logo on NPT fittings to create your brand. We do not charge any cost for printing your logo.

NPT Fittings Factory

Brass tube fittings manufacturer
Manufacturing instrumentation pipe fittings

Our factory manufactures NPT fittings for more than 20 years. Workers have at least 10 years of operating the lathes, and our boss has full experience in NPT fittings technology. So we can custom-make your required NPT fittings according to your drawings or samples. During the manufacturing process, workers measure every thread of NPT fitting by thread gauge. We can make sure that you will receive qualified NPT fittings.

There are mature supplier chains around our factory, and the raw materials and some treatments are supplied on time. And our lathes are all automated, which can manufacture hundreds of fittings in one day. So we can ensure quicker delivery time of NPT fittings.

As NPTLOK is a factory, we can give you the lowest price at a stable quality and quicker delivery time. Why not choose our factory? Contact us now!

NPT Fittings Applications

Chemical & Petro-Chemical Processing
Chemical Industry

NPT fittings are used in Chemical industries.

Natural and gas
Natural and gas

NPT fittings are used in natural and gas industries.

NPT Thread Chart And NPT Fittings Catalogue

There are both internal and external threads on fittings that should be conformed to standards for NPT fittings. We offer sizing charts for you to measure diameters for both male and female threads.

We summarize the dimensions of commonly used sizes for you to choose NPT fittings according to your requirements. Be careful that as some NPT fittings have the same TPI, they can be used with each other due to the taper.

NPT thread dimensions in mm and inch in the below NPT thread chart:

NPT sizing chart

Choose NPT fittings sizes and types in the below catalogue

NPT Fittings Catalogue

Advantages of Using NPT Fittings

Here are some advantages of using NPT fittings

  • NPT fittings are ideal for single assembling applications without tubes, ferrules, or o-rings
  • A large variety of sizes, combinations, and materials are available
  • Widely used in project applications

Contact us for NPT fittings inquiries if you have requirements for them.

Can I get samples of NPT fittings

Yes, we can offer samples of NPT fittings for you to test the quality

Can you also offer stainless steel tubing to connect NPT fittings?

Yes, we can supply stainless steel tubing for you with MTC (Material Test Certificate)

Have your NPT fittings exported to other countries?


Can I visit your factory?

Yes, we welcome you to visit our factory and our workshop

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