1/2-20 Screw Dimensions: A Comprehensive Guide
The 1/2-20 screw is a type of fastener commonly used in various industries, including aerospace, automotive, and construction. Understanding the dimensions of this screw is crucial to ensure proper fitting and functionality. In this article, we will delve into the details of 1/2-20 screw dimensions and provide a comprehensive guide for your reference.
Thread Size and Pitch
The 1/2-20 screw has a thread size of 1/2 inch, which means the major diameter of the screw thread is 1/2 inch (12.7 mm). The pitch of the thread is 20 threads per inch (TPI), which is a coarse thread pitch. The combination of thread size and pitch provides a strong and secure fastening system.
Major Diameter
The major diameter of the 1/2-20 screw is 0.500 inches (12.7 mm). This is the largest diameter of the screw thread, measured from the crest of one thread to the crest of the adjacent thread.
Minor Diameter
The minor diameter of the 1/2-20 screw is 0.442 inches (11.2 mm). This is the smallest diameter of the screw thread, measured from the root of one thread to the root of the adjacent thread.
Thread Length
The thread length of the 1/2-20 screw varies depending on the screw type and application. Typically, the thread length ranges from 1/4 inch to 2 inches (6.4 mm to 50.8 mm).
Head Dimensions
The head dimensions of the 1/2-20 screw include:
- Head diameter: 0.625 inches (15.9 mm)
- Head height: 0.250 inches (6.4 mm)
Socket Size
The socket size required for a 1/2-20 screw is typically 3/4 inch (19.1 mm).
Applications
The 1/2-20 screw is commonly used in various applications, including:
- Aerospace: Engine mounts, landing gear, and structural components
- Automotive: Engine blocks, cylinder heads, and suspension components
- Construction: Heavy-duty fastening applications, such as bridge construction and building foundations
- Industrial: Machinery, equipment, and structural components
Conclusion
In conclusion, understanding the dimensions of the 1/2-20 screw is crucial to ensure proper fitting and functionality in various applications. By referring to this comprehensive guide, you can ensure that you have the correct dimensions for your specific needs. Remember to always consult with a fastening expert or manufacturer's specifications for specific requirements.
