.250-28 UNF: Understanding the Thread Dimensions
The .250-28 UNF thread is a type of thread used in various industries, including aerospace, automotive, and manufacturing. In this article, we will delve into the details of this thread dimension and explore its applications, advantages, and specifications.
What does .250-28 UNF mean?
The .250-28 UNF thread is a Unified National Fine (UNF) thread with a major diameter of 0.250 inches (6.35 mm) and 28 threads per inch (TPI). The "UNF" designation indicates that the thread is part of the Unified Thread Standard, which is a system of screw threads widely used in the United States and Canada.
Thread Dimensions
The .250-28 UNF thread has the following dimensions:
- Major Diameter: 0.250 inches (6.35 mm)
- Threads per Inch (TPI): 28
- Thread Pitch: 0.036 inches (0.91 mm)
- Thread Depth: 0.025 inches (0.64 mm)
Applications
The .250-28 UNF thread is commonly used in various industries, including:
- Aerospace: Used in aircraft and spacecraft applications, where high-strength, lightweight fasteners are required.
- Automotive: Used in high-performance engine and transmission components, where high-torque and high-temperature resistance are necessary.
- Manufacturing: Used in precision machinery and equipment, where high-precision and high-strength fasteners are required.
Advantages
The .250-28 UNF thread offers several advantages, including:
- High-strength: The thread provides high-strength fastening, making it suitable for demanding applications.
- High-precision: The fine thread pitch enables precise assembly and reduces the risk of stripping or damage.
- Low-torque: The thread requires low torque, making it easier to assemble and disassemble.
Conclusion
In conclusion, the .250-28 UNF thread is a versatile and widely used thread dimension in various industries. Its high-strength, high-precision, and low-torque characteristics make it an ideal choice for demanding applications. By understanding the specifications and applications of this thread, engineers and manufacturers can ensure precise and reliable assembly in their products.
