What Size Drill Bit for 5 16 Tap


by Hannah Evert


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A 5/16 tap is a tool used to create threads in materials such as metal. The size of drill bit you will need for a 5/16 tap depends on the type of material you are working with and the depth of the threads you wish to create. For example, if you are working with soft metals such as aluminum, you will need a smaller drill bit than if you were working with harder metals such as steel.

In general, the deeper the threads you wish to create, the larger the drill bit you will need.

If you’re looking to tap a 5/16″ hole, you’ll need a drill bit that’s slightly smaller in order to create the threads. The most common size is an 7/32″ drill bit, but you can also use a 1/4″ or even a 3/8″ drill bit if needed. Just be sure to use the correct size so that your threads are properly cut.

How to calculate Drill bit size for tapping?

5/16 Tap Drill Size in Mm

When it comes to drill bits, there are a variety of sizes and types to choose from. But what does each size mean? In this blog post, we’ll be discussing the 5/16 tap drill size in mm.

This is a popular size for many applications, so it’s important to know the specifics. The 5/16 tap drill size in mm is actually pretty small. It measures just 2.38mm in diameter.

Despite its small size, this drill bit is still capable of creating large holes. It’s often used for tasks like creating pilot holes or enlarging existing holes. When using a 5/16 tap drill bit, it’s important to use the correct speed and feed rate.

Too much speed can cause the bit to break or wear down too quickly. Too little speed will result in a poor hole quality and an increased risk of breakage. The perfect speed will vary depending on the material you’re drilling into and the type of coating on the bit itself.

If you’re looking for a versatile drill bit that can handle a variety of tasks, then look no further than the 5/16 tap drill size in mm!

What Size Drill Bit for 5 16 Tap

Credit: valuhomecenters.com

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

When it comes to tapping holes, the size of the drill you use will depend on the specific application. For example, if you’re working with soft materials like wood or plastic, you can get away with using a slightly smaller drill bit than what is specified for the tap.

However, when drilling into harder metals, it’s important to use a drill bit that is precisely the same size as the tap.

This will ensure a tight fit and prevent damage to your tools. In general, for a 5/16 tap, you would want to use a 5/16 drill bit. This will give you the best results and help prolong the life of your tools.

What Size Drill Bit Do I Need for a 5/16-24?

There are two main factors to consider when determining the size of drill bit needed for a 5/16-24: the pitch (threading) and the diameter. The 5/16-24 threading is a course threading, meaning it has 24 threads per inch (TPI). This is compared to a fine threading, which would have more threads per inch.

For example, a 1/4-20 threading is a fine threading because it has 20 threads per inch. In general, you will need a smaller drill bit for a course threading than you will for a fine threading. The second factor to consider is the diameter of the hole that needs to be drilled.

The 5/16 in this case refers to the diameter of the hole that needs to be drilled; therefore, you will need a 5/16 drill bit. Putting these together, you will need either a 5/32 or 3/16 drill bit for your project, depending on how tight of tolerances you require. If you need an extremely precise fit, go with the 3/16 drill bit.

If not, then the 5/32 should suffice.

Which is Bigger 3/8 Or 5/16 Drill Bit?

There is a big difference between 3/8″ and 5/16″ drill bits, with the former being noticeably bigger. However, both of these sizes are still considered to be small diameter bits. When it comes to choosing the right size bit for a particular job, there are several factors to consider, such as the material you’ll be drilling into and the depth of the hole you need to create.

In general, though, the 3/8″ bit will give you a larger hole than the 5/16″ bit.

What Size Drill Bit Do I Need for a 5/16-18 Bolt?

Assuming you’re talking about US customary units, a 5/16-18 bolt has a major diameter of 0.3125 inches (5/16th of an inch). The best way to drill a hole for this bolt is to use a bit that is slightly smaller than the major diameter. In this case, a 7/32 inch bit would be ideal.

This will create a snug fit for the bolt, making it less likely to loosen over time.


Drilling a hole for a 5/16″ tap can be tricky because the drill bit must be exactly the right size. If it’s too small, the tap won’t fit properly. If it’s too large, the threads will be damaged.

The best way to ensure success is to use a drill bit that is slightly smaller than the tap. This way, you can be sure that the threads will line up perfectly and there won’t be any damage to the surrounding material.

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