If you’re working with any sort of threaded fastener, it’s important to know the tap drill size for the threads you’re using. The 5/16-18 tap drill size is a common size for many applications. In this blog post, we’ll discuss what the 5/16-18 tap drill size is. After reading this post, you’ll be able to confidently choose the right tap drill size for your next project. Let’s get started.

What is the 5/16-18 Tap Drill Size?

When it comes to choosing the right tap drill size, there are a few things to keep in mind. First, the tap drill size should be slightly smaller than the Minor Diameter of the tap. Second, the type of material being tapped also plays a role in determining the correct tap drill size. For example, softer metals such as aluminum require a larger tap drill size than harder metals such as steel [1]. 

With that said, the 5/16-18 tap has a Minor Diameter of 0.2752 inches, which means that the recommended tap drill size is 0.2570 or 0.2610 inches. For softer metals, a slightly larger tap drill size may be needed, but for most applications, the 5/16-18 tap will create threads that are both strong and reliable.

What Size Drill Do You Use for a 5/16 18 Tap?

When it comes to drilling holes, there are a few factors to consider. First, you need to choose the right drill bit for the job. For a 5/16 18 tap, you will need to use a 0.2570 or 0.2610-inch drill bit. Second, you need to make sure that the drill bit is properly aligned with the hole that you want to drill. This can be done by using a center punch to create a small divot in the center of the hole. 

Finally, you need to apply enough pressure to the drill bit to ensure that it penetrates the material. If you are drilling through metal, you may need to use a lubricant to help reduce friction. With proper technique and the right tools, drilling a hole should be a simple task.

Conclusion

In conclusion, the 5/16-18 tap drill size is a common size for many applications. The recommended tap drill size is 0.2570 or 0.2610 inches. When drilling holes, it’s important to choose the right drill bit and apply enough pressure to ensure that the hole is properly drilled. With proper technique and the right tools, drilling a hole should be a simple task.