1/4 NPT Dimensions Female: Understanding the Specifications
The 1/4 NPT (National Pipe Taper) thread is a standardized thread form used for piping and tubing connections. The female version of this thread is commonly used in various industries, including aerospace, automotive, and industrial manufacturing. In this article, we will delve into the dimensions and specifications of the 1/4 NPT female thread.
Thread Dimensions
The 1/4 NPT female thread has a thread size of 1/4 inch, with a nominal diameter of 0.25 inches (6.35 mm). The thread has a taper of 1:16, meaning that for every 16 inches of thread length, the diameter increases by 1 inch.
Here are the key dimensions of the 1/4 NPT female thread:
- Major Diameter: 0.25 inches (6.35 mm)
- Minor Diameter: 0.20 inches (5.08 mm)
- Pitch: 0.050 inches (1.27 mm)
- Threads per Inch: 27
- Length: varies depending on the specific application
Thread Form
The 1/4 NPT female thread has a tapering thread form, with a 60-degree angle between the threads. The thread crest is rounded, and the thread root is flat.
Applications
The 1/4 NPT female thread is commonly used in a variety of applications, including:
- Pneumatic systems: for connecting air hoses and tubes
- Hydraulic systems: for connecting hydraulic hoses and tubes
- Fuel systems: for connecting fuel hoses and tubes
- Industrial manufacturing: for connecting pipes and tubes in industrial processes
Standards and Certification
The 1/4 NPT female thread is specified in various industry standards, including:
- ANSI/ASME B1.20.3: This standard covers the thread dimensions and tolerances for 1/4 NPT threads.
- SAE J514: This standard covers the thread dimensions and tolerances for 1/4 NPT threads in the aerospace industry.
In conclusion, the 1/4 NPT female thread is an important thread form used in various industries. Understanding its dimensions, thread form, and applications is crucial for ensuring proper connections and avoiding errors. By following industry standards and certification, manufacturers can ensure that their products meet the required specifications.
