Manufacturer Of Double Ferrule Fittings

NPTLOK double ferrule fittings save cost and time for you

  • NPTLOK is a real factory
  • NPTLOK offer you competitive price
  • NPTLOK control production time
  • NPTLOK make sure on-time delivery time

NPT-LOK Double Ferrule Fittings

NPTLOK Double ferrule fittings provide a perfect connection thanks to their strong mechanical grip design. The fittings can be used for tubing with various thicknesses and different hardness levels.

NPTLOK is very familiar with double ferrule fittings, as our factory is found in 1999, and has more than 20 years’ experience in it.

One of our customers has saved much cost for his company after he purchased double ferrule fittings from us

Stable quality, on-time delivery, and smooth communication make you save lots of time, as time is an essential cost for your business.

Union Tube Fittings

Both ends are all double ferrule types and are the same size.

Male Connector

One end is double ferrule, and another side is the male thread.

reducing union

Both ends are double ferrule types, but not the same size.

Female Connector
Female Connector

One side is double ferrule, and another side is the female thread.

Union Elbow

Both ends are double ferrule types, and their sizes are the same.

Union Tee

Three ends are double ferrule types, and their sizes are the same.

7 Products Found.

Design Of Double Ferrule Fittings

The basic design of double ferrule fittings consists of four main pieces:

  1. Nut
  2. Front Ferrule
  3. Back Ferrule
  4. Body
The nut will be silver plated to protect the thread, Ferrules will be hardened for high pressure. Normally the body will be machined in the bar for straight fittings and will be forged for elbow, tee, or cross. Anyway, It is upon the customer’s requirement.
  • Nut
    Tube Nut

    Material: 316 Stainless Steel, Brass, Carbon Steel
    Bar Stock: ASTM A479, ASTM A276
    Forging: ASTM B164

  • Front Ferrule
    Front Ferrule

    Material: 316 Stainless Steel, Brass, Carbon Steel
    Style: Front
    Size: 1/8”-1”

  • Back Ferrule
    Back Ferrule

    Material: 316 Stainless Steel, Brass, Carbon Steel
    Style: Back
    Size: 1/8”-1”

  • Tube Fitting Body
    Tube Fitting Body

    Material: 316 Stainless Steel, Brass, Carbon Steel
    Style: Tube Fitting Body
    Size: 1/8”-1”

Advantage of NPT-LOK Double Ferrule Fittings

  • Material is optional
    Material is optional

    stainless steel, carbon steel, copper material or monel, alloy400 is available.

  • Regular Size Optional
    Regular Size Optional

    Size range from 1/8” to 1” ( 3.175mm to 25.4mm)

  • Good Resistance
    Good Resistance

    Be resistant to high pressure and high temperature

  • Good strength
    Good strength

    Offer maximum strength, ductility, and durability

  • OEM
    OEM is accepted

    OEM is accepted, and customers can print their own logo on products.

Product Feature Box

resist high pressure
Resist High Pressure

Good material and Make hardening treatment in the ferrule to resist high pressure

Assemble easily
Assemble easily

Assemble fittings easily, and disassemble easily too by nut and ferrule

Warranty 2 Years

In 2 years,  we will send you new fittings if they have quality problems.

Shot blasting treatment
Shot blasting treatment

NPTLOK makes shot blasting treatment on the surface of fittings.

NPTLOK Double Ferrule Fittings Resist High Pressure

NPTLOK double ferrule fittings use really good materials: stainless steel 304, 316, carbon steel, brass, Monel, or alloy400, which can resist high pressure.

NPTLOK also makes hardening treatment in the ferrules to make sure high pressure and good sealing.

Check the pressure test video of NPTLOK double ferrule fittings.

High Pressure

NPTLOK double ferrule fittings assemble and disassemble easily

NPTLOK double ferrule fittings are made up of 4 parts: a body, nut, front ferrule, and back ferrule.

NPTLOK double ferrule fittings famously have a two-ferrule design, that provides unparalleled performance. Assemble and Disassemble very easily.

NPTLOK Double Ferrule Fittings Offer 2 Years Warranty

NPTLOK double ferrule fittings offer you 2 years warranty. In 2 years, if there is a quality problem with the fittings, we will send new fittings to you for free.

NPTLOK customers have good feedback about the quality of double ferrule fittings. NPTLOK has confidence that you will use our double ferrule fittings for a long time because of NPTLOK’s mature technology.

Warranty 2 years
Shot blasting treatment

NPTLOK Double Ferrule Fittings Have Nice Appearance

NPTLOK makes a shot blasting treatment on the surface of double ferrule fittings, which removes any grease, dust, rust, or mill scales.

This treatment cleans the fittings and makes double ferrule fittings look beautiful.

Why NPTLOK Double Ferrule Fittings

Quality Assarance
Lath Operation
  1. 20 Years Of Experience In Manufacturing And ISO Certificate Make Sure Good Quality
  • ISO 9001 Certificate
  • 20 Years of Experience In Manufacturing Double Ferrule Fittings, Which Ensure Stable Quality For Double Ferrule Fittings
  • Quality Guarantee: 2 years
  • Emergency Replacement: If There Is Defective Product, New Good One Will Be Replaced Right Away.
  • Good Feedback And Reorder From Customer About Double Ferrule Fittings

2. Good Price Directly From The Factory Makes Your Product More Competitive In The Local Market

  • No Middle Man, You Will Get Bottom Price Of Double Ferrule Fittings Directly From Factory
  • Reasonable Price Do Not Mean Cheap Quality. You Get High Quality Of Double Ferrule Fittings At a Real Good Price

3. On-time Delivery Make Sure Your Good Reputation To Your Customer

  • Complete And Mature Supply Chain Around Factory, Which Make Sure On-Time Delivery Of Double Ferrule Fittings
  • Production Plan Will Be Made According To Your Order And Is Special Worker Will Follow Up on Your Order From the Start

What You Care About When Using Double Ferrule Fittings

Polished Tube
What kind of tube is suitable for double ferrule fittings

For double ferrule fittings, it is better to use a polished seamless tube without a scratch on it, which is good for bending, expanding, and leak-free connection. Do not suggest using tube blank.

How double ferrule fitting work
How Double Ferrule Fittings Work

The front ferrule creates a seal against the fitting body and on the tubing outside diameter. As the nut is turned, the back ferrule advances the front ferrule and radially applies an effective tube grip

More Knowloge About NPTLOK Double Ferrule Fittings

Pressure Unit Conversion
Different Units Switch Of Double Ferrule Fittings

Inch to Millimeter: 1 Inch = 25.4 MM

Psi to Mpa: 1 Psi = 0.0068948 Mpa

Psi to Bar: 1 Psi = 0.0689476 Mpa

Mpa to Bar: 1 Mpa = 10 Bar

OEM Is Accepted For Double Ferrule Fittings

Manufacture double ferrule fittings according to your drawings. Custom your requirement. It is available to print your logo on double ferrule fittings upon your requirement. We use a laser machine to print logos, sizes, and specifications on ferrule fittings.

You can create your own brand to promote it in your market.

Double ferrule banner
NPTLOK Manufacture Double Ferrule Fittings For More Than 20 Years

NPTLOK offers a wide range of double ferrule fittings from 1/8”-1”.

You can choose required size according to your requirement.

Contact Us For Catalog of Double Ferrule Fittings

Regular Size Optional

  • “We have received your products, and our engineer tested and approved your quality. We will promote your fittings and valves in our market “

    Mr. Fred
  • “Your fittings and valves saved a lot cost for your company, at the same time, quality is good. It is a fabulous company.”

    Mr. Dilip

Related Products

Advantages of double ferrule fittings in China than double ferrule fittings manufacturer in India

The most significant advantage of manufacturing double ferrule fittings in China is that there is a complete and mature supply chain around our factory, for example, the manufacturer of the ferrules, supplier of raw materials, and all treatment plants are near our factory. All of these suppliers have more than 10 years of experience. We do not need to import any accessory of double ferrule fittings from another country. A complete and mature supply chain makes sure On-Time delivery, and be easy to control quality.

Do NPTLOK make silver plating inside the nut of double ferrule fittings?

Yes. NPTLOK silver plating inside the nut to protect the thread.

Do you have catalog of double ferrule fittings?

Yes. Contact us for a complete catalog of double ferrule fittings. You can choose the required size according to your requirement.

What is MOQ of double ferrule fittings?

10 pcs

Can I get sample of double ferrule fittings to test the quality?


Do you have MTC(Materail Test Certificate) of double ferrule fittings?

Yes, NPTLOK can offer MTC

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