.25-20 UNC-2B Dimensions: A Comprehensive Guide
The .25-20 UNC-2B thread is a type of threads commonly used in various engineering applications. In this article, we will delve into the dimensions and specifications of .25-20 UNC-2B threads, providing you with a comprehensive understanding of this thread type.
Overview of UNC Threads
Before we dive into the specifics of .25-20 UNC-2B threads, let's first understand what UNC threads are. UNC stands for Unified National Coarse, which is a thread standard widely used in the United States and Canada. UNC threads are designed to provide a coarse thread pitch, which makes them suitable for applications where a high degree of thread engagement is required.
.25-20 UNC-2B Thread Dimensions
The .25-20 UNC-2B thread has a diameter of 0.25 inches (6.4 mm) and a thread pitch of 20 threads per inch (TPI). The "2B" designation indicates that this thread is a "general-purpose" thread, which means it is suitable for a wide range of applications.
Here are the key dimensions for .25-20 UNC-2B threads:
- Major Diameter: 0.25 inches (6.4 mm)
- Pitch: 20 TPI (1.27 mm)
- Minor Diameter: 0.2165 inches (5.50 mm)
- Thread Length: Varies depending on the application
Thread Class and Tolerance
The "2B" designation in .25-20 UNC-2B indicates that this thread has a tolerance class of 2B, which is a moderate tolerance class. This means that the thread has a moderate degree of precision and is suitable for general-purpose applications.
Applications of .25-20 UNC-2B Threads
.25-20 UNC-2B threads are commonly used in a variety of applications, including:
- Machine Building: .25-20 UNC-2B threads are often used in machine building applications where a high degree of thread engagement is required.
- Automotive: These threads are used in various automotive applications, including engine mounts and suspension components.
- Aerospace: .25-20 UNC-2B threads are used in aerospace applications where high-strength and high-reliability are critical.
Conclusion
In conclusion, .25-20 UNC-2B threads are a type of thread commonly used in various engineering applications. With a diameter of 0.25 inches and a thread pitch of 20 TPI, these threads provide a high degree of thread engagement and are suitable for general-purpose applications. By understanding the dimensions, specifications, and applications of .25-20 UNC-2B threads, you can make informed decisions when selecting threads for your next project.
