Difference Between Npt And Mpt
Emma Valentine
Published Apr 10, 2026
Npt and Mpt are two different types of threading standards used in industrial applications. Although they are both threading standards, they have some notable differences which make them suitable for different applications. In this article, we will explore the differences between Npt and Mpt to help you determine which one is the best fit for your project.
What Is Npt?
Npt stands for National Pipe Thread and is a standard of pipe threading used in the United States and Canada. It is a tapered threading system which is commonly used for connecting pipes and fittings. Npt is often used for applications that require a tight seal, such as plumbing systems.
What Is Mpt?
Mpt stands for Male Pipe Thread and is another type of pipe threading standard. It is a straight threading system, meaning the threads are not tapered like they are in the Npt standard. This makes Mpt more suitable for applications such as connecting couplings and fittings, as it does not require a tight seal.
Advantages of Npt
The primary advantage of Npt is that it creates a tight seal. The tapered threading ensures that the threads are securely fastened, making it ideal for plumbing systems that require a watertight seal. Npt is also relatively easy to work with and can be used for a variety of applications.
Advantages of Mpt
The primary advantage of Mpt is that it does not require a tight seal. The straight threading makes it better suited for applications that do not require a watertight seal, such as connecting couplings and fittings. Mpt is also easier to work with than the Npt standard, and can be used in a variety of applications.
Npt vs. Mpt
Both Npt and Mpt are threading standards used for connecting pipes and fittings. Npt is a tapered threading standard which is suitable for applications that require a tight seal, such as plumbing systems. Mpt is a straight threading standard which is better suited for applications that do not require a tight seal, such as connecting couplings and fittings.
Which Standard Is Best?
The best threading standard for your project will depend on the type of application you are using it for. If you need a tight seal, then the Npt standard is the best choice. If you do not need a tight seal, then the Mpt standard is the better option.
Conclusion
Npt and Mpt are two different types of threading standards used in industrial applications. Npt is a tapered threading system which is suitable for applications that require a tight seal, while Mpt is a straight threading system which is better suited for applications that do not require a tight seal. Ultimately, the best threading standard for your project will depend on the type of application you are using it for.
Summary
Npt and Mpt are two different types of threading standards used in industrial applications. Npt is a tapered threading system which is suitable for applications that require a tight seal, while Mpt is a straight threading system which is better suited for applications that do not require a tight seal. Ultimately, the best threading standard for your project will depend on the type of application you are using it for.