The Ultimate Guide To #8 Screw Drill Bit Size In 2023


Drilling a hole for a #8 screw requires a specific drill bit size. While it may seem like a small detail, using the correct size drill bit is crucial for a successful project. In this article, we will discuss everything you need to know about #8 screw drill bit size, including the best drill bits to use, tips for drilling, and much more.

What is a #8 Screw?

Before diving into drill bit sizes, it’s important to understand what a #8 screw is. A #8 screw is a common size used in woodworking and construction projects. It’s 1/4 inch in diameter and has 32 threads per inch. #8 screws are typically used for attaching hardware, such as cabinet hinges, to wood.

Drill Bit Sizes for #8 Screws

The recommended drill bit size for a #8 screw is 11/64 inch. This size ensures that the screw will have enough room to thread into the wood without splitting it. However, it’s important to note that the size of the hole may vary depending on the type of wood being used. So, it’s always a good idea to test the drill bit size on a scrap piece of wood before drilling into your project.

Types of Drill Bits for #8 Screws

When it comes to drilling holes for #8 screws, there are several types of drill bits to choose from. Here are some of the most common types:

Twist Drill Bits

Twist drill bits are the most common type of drill bit and are suitable for drilling into wood, metal, and plastic. They come in a variety of sizes, including the recommended 11/64 inch size for #8 screws.

Brad Point Bits

Brad point bits are designed for drilling into wood and have a sharp point that makes it easier to start the hole. These bits are ideal for woodworking projects that require precision drilling.

Spade Bits

Spade bits are flat, paddle-shaped bits that are ideal for drilling larger holes in wood. They are not recommended for precision drilling, but rather for drilling holes for larger screws or bolts.

Tips for Drilling Holes for #8 Screws

Here are some tips to help you drill holes for #8 screws:

Use a Center Punch

Before drilling, use a center punch to make a small indentation in the wood where you want to drill the hole. This will help prevent the drill bit from slipping and ensure that the hole is drilled in the right spot.

Drill Straight

When drilling, make sure to keep the drill bit straight and perpendicular to the wood. Drilling at an angle can cause the screw to go in crooked and damage the wood.

Use a Depth Stop

Using a depth stop on your drill bit will help ensure that the hole is drilled to the correct depth. This is important for preventing the screw from going too deep or not deep enough.

Use a Clamping Device

Using a clamping device to secure the wood in place while drilling will help prevent the wood from moving or slipping, which can cause the hole to be drilled in the wrong spot.


Drilling holes for #8 screws may seem like a simple task, but using the correct drill bit size and technique is crucial for a successful project. By following the tips outlined in this article and using the recommended 11/64 inch drill bit size, you can ensure that your project is built to last.