GITNUX REPORT 2024

# Npt Size Chart

The NPT Size Chart provides information on various NPT sizes, including their major diameter, threads per inch, outside diameter, and pitch diameter.

Author: Jannik Lindner

First published: 7/17/2024

The NPT Size Chart provides a detailed reference for various NPT sizes, including major diameter, threads per inch, outside diameter, and pitch diameter. This chart serves as a valuable resource for understanding the dimensions of different NPT sizes commonly used in piping and plumbing applications.

## Chart Data

NPT Size Major Diameter (inches) Threads per inch Outside Diameter (inches) Pitch Diameter (inches)
1/16″ 0.3125 27 0.405 0.242
1/8″ 0.405 27 0.540 0.337
1/4″ 0.540 18 0.710 0.419
3/8″ 0.675 18 0.840 0.547
1/2″ 0.840 14 1.050 0.682

## Conclusion

The NPT Size Chart provides essential information such as major diameter, threads per inch, outside diameter, and pitch diameter for various NPT sizes ranging from 1/16" to 1/2". This data is crucial for understanding the dimensions and specifications of NPT fittings used in plumbing and piping applications.

## FAQ

### What is the standard NPT size for a 1/2 inch pipe?

The standard NPT size for a 1/2 inch pipe is 1/2 inch.

### How do I determine the NPT size of a fitting?

The NPT size of a fitting is determined by measuring the diameter of the threaded portion in inches.

### Can NPT sizes be converted to metric sizes?

Yes, NPT sizes can be converted to metric sizes using conversion tables or calculators.

### What is the difference between NPT and NPTF thread sizes?

NPT (National Pipe Taper) threads are tapered, while NPTF (National Pipe Taper Fuel) threads are dryseal threads designed for use in fuel and oil applications.

### Are NPT sizes compatible with BSPT sizes?

NPT (American National Standard Taper Pipe Thread) sizes are not compatible with BSPT (British Standard Pipe Taper) sizes due to differences in taper angle and thread pitch.