5/16-24 UNF-2A Dimensions: A Comprehensive Guide
The 5/16-24 UNF-2A thread is a type of screw thread commonly used in various industries, including aerospace, automotive, and construction. Understanding the dimensions of this thread is crucial for engineers, designers, and manufacturers to ensure proper fit, function, and safety. In this article, we will delve into the details of the 5/16-24 UNF-2A dimensions.
Thread Size and Pitch
The 5/16-24 UNF-2A thread has a major diameter of 0.3125 inches (7.94 mm) and a pitch of 24 threads per inch (TPI). The thread size is 5/16 inch, which is equivalent to 7.94 mm.
Thread Series
The 5/16-24 UNF-2A thread belongs to the UNF (Unified National Fine) thread series, which is a standard thread series used in the United States and Canada. The UNF thread series is characterized by a fine pitch and a rounded root and crest.
Thread Form
The 5/16-24 UNF-2A thread has a rounded root and crest, with a thread angle of 60 degrees. The thread form is designed to provide a strong and efficient connection between mating parts.
Dimensions
The following are the dimensions of the 5/16-24 UNF-2A thread:
Major Diameter
- Major diameter: 0.3125 inches (7.94 mm)
Pitch Diameter
- Pitch diameter: 0.2905 inches (7.38 mm)
Root Diameter
- Root diameter: 0.2454 inches (6.23 mm)
Thread Length
- Thread length: varies depending on the application and specification
Thread Depth
- Thread depth: 0.0469 inches (1.19 mm)
Tolerances
The 5/16-24 UNF-2A thread has specific tolerances to ensure proper fit and function. The tolerances for the major diameter, pitch diameter, and root diameter are as follows:
Major Diameter Tolerance
- +0.001 to -0.003 inches (+0.025 mm to -0.076 mm)
Pitch Diameter Tolerance
- +0.001 to -0.002 inches (+0.025 mm to -0.051 mm)
Root Diameter Tolerance
- +0.001 to -0.003 inches (+0.025 mm to -0.076 mm)
Applications
The 5/16-24 UNF-2A thread is commonly used in various industries, including:
- Aerospace: used in aircraft and spacecraft applications
- Automotive: used in engine mounts, suspension systems, and other components
- Construction: used in building structures, bridges, and other infrastructure projects
Conclusion
In conclusion, the 5/16-24 UNF-2A thread is a critical component in various industries, and understanding its dimensions is essential for ensuring proper fit, function, and safety. By following the dimensions and tolerances specified in this article, engineers, designers, and manufacturers can ensure that their products meet the required standards and specifications.
