1/4 NPT Internal Thread Dimensions in MM
The 1/4 NPT (National Pipe Taper) internal thread is a common thread standard used in piping systems. NPT threads are used for creating a seal between two pipes or fittings, and are tapered to allow for a tighter seal as the threads are engaged.
Thread Dimensions:
Here are the internal thread dimensions for a 1/4 NPT thread in millimeters:
| Thread Parameter | Dimension (mm) |
|---|---|
| Major Diameter (D) | 12.7 |
| Minor Diameter (d) | 10.2 |
| Pitch (P) | 1.814 |
| Thread Length (L) | 12.7 |
Thread Form:
The 1/4 NPT internal thread has a tapered thread form, with a taper of 1:16 (3/4 inch per foot). The thread has a rounded root and a flat crest.
Threads per Inch (TPI):
The 1/4 NPT internal thread has 18 threads per inch (TPI).
Common Applications:
1/4 NPT internal threads are commonly used in:
- Pneumatic and hydraulic systems
- Industrial process piping
- Oil and gas applications
- Aerospace and defense industries
Important Note:
When working with NPT threads, it is essential to ensure that the threads are properly cleaned and lubricated to ensure a tight seal. Additionally, it is crucial to follow proper assembly and torque procedures to avoid damage to the threads or surrounding material.
I hope this information helps you in your project or application. If you have any further questions or concerns, please do not hesitate to ask.
