1/4-27 NPT Thread Dimensions: A Comprehensive Guide
The 1/4-27 NPT thread is a standardized thread type used in various industries, including piping, tubing, and fittings. NPT stands for National Pipe Taper, which refers to the tapered thread design that allows for a secure connection between two components. In this article, we will delve into the dimensions and specifications of the 1/4-27 NPT thread.
Thread Dimensions
The 1/4-27 NPT thread has a major diameter of 0.25 inches (6.35 mm) and a minor diameter of 0.173 inches (4.39 mm). The thread pitch is 27 threads per inch (TPI), which is a coarse thread pitch.
Thread Length
The thread length for a 1/4-27 NPT thread is typically 0.625 inches (15.88 mm) for a standard fitting. However, this length can vary depending on the specific application and the manufacturer's specifications.
Taper
The 1/4-27 NPT thread has a taper of 3/4 inch per foot, which means that the thread diameter decreases by 3/4 inch for every foot of thread length. This taper allows for a secure connection between the male and female threads.
Applications
The 1/4-27 NPT thread is commonly used in various industries, including:
- Pneumatic and hydraulic systems: for connecting tubes and fittings in pneumatic and hydraulic systems.
- Industrial equipment: for connecting pipes and fittings in industrial equipment, such as pumps, valves, and cylinders.
- Automotive: for connecting fuel lines, brake lines, and other tubing in automotive applications.
Conclusion
In conclusion, the 1/4-27 NPT thread is a widely used thread type in various industries. Understanding the dimensions and specifications of this thread is crucial for ensuring a secure and reliable connection between components. By following the guidelines outlined in this article, engineers and technicians can ensure that their designs and assemblies meet the required standards for safety and performance.
