1/2-20 Bolt Dimensions: A Comprehensive Guide
The 1/2-20 bolt is a type of fastener commonly used in various industries, including automotive, aerospace, and construction. It is essential to understand the dimensions of this bolt to ensure proper fitting and assembly. In this article, we will delve into the dimensions of a 1/2-20 bolt and provide a detailed breakdown of its specifications.
What does 1/2-20 mean?
Before we dive into the dimensions, let's understand what the "1/2-20" designation means. The "1/2" refers to the bolt's diameter, which is half of an inch (0.5 inches or 12.7 mm). The "20" represents the threads per inch (TPI), which means the bolt has 20 threads per linear inch.
Dimensions of a 1/2-20 Bolt
Here are the dimensions of a 1/2-20 bolt:
Major Diameter
The major diameter of a 1/2-20 bolt is 0.5 inches (12.7 mm). This is the diameter of the bolt's threaded portion.
Minor Diameter
The minor diameter, also known as the root diameter, is 0.433 inches (11 mm). This is the diameter of the bolt's unthreaded portion.
Thread Length
The thread length of a 1/2-20 bolt can vary depending on the application. Typically, it ranges from 1 inch (25.4 mm) to 6 inches (152.4 mm).
Tip Angle
The tip angle of a 1/2-20 bolt is 60 degrees.
Thread Pitch
The thread pitch of a 1/2-20 bolt is 1.27 mm (0.05 inches).
Length
The length of a 1/2-20 bolt can vary depending on the application. It can range from 1 inch (25.4 mm) to 12 inches (304.8 mm) or more.
Other Specifications
In addition to the dimensions mentioned above, a 1/2-20 bolt also has other specifications that are important to consider:
Material
1/2-20 bolts are typically made from steel, stainless steel, or titanium.
Finish
The finish of a 1/2-20 bolt can be plain, zinc-plated, black oxide, or chrome-plated.
Strength
The strength of a 1/2-20 bolt is measured in pounds per square inch (PSI). The minimum tensile strength is typically around 120,000 PSI.
Conclusion
In conclusion, understanding the dimensions of a 1/2-20 bolt is crucial for proper assembly and fitting. By knowing the major diameter, minor diameter, thread length, tip angle, thread pitch, and length, you can ensure that your project or application is successful. Remember to also consider the material, finish, and strength of the bolt to ensure compatibility and safety.
