What is a 6-32 Tap Drill Size

tap drill kit

When it comes to holes and screws, it’s important to know your drill sizes. In this post, we’ll be discussing the 6-32 tap drill size. This is a commonly used size for small screws, so it’s good to know what size drill bit to use. Keep reading to learn more.

What is a 6-32 Tap Drill Size?

A 6-32 tap drill size is a standard size used for tapping and drilling machines. The size refers to the diameter of the hole that will be created by the tap. This particular size is often used for creating smaller threads, such as those used in electronic components. When using a 6-32 tap drill size, it is important to select the correct taps and dies for the job. 



The wrong tools can damage the material being worked on, as well as create uneven or incorrect threads. With the proper tools and a little practice, creating threads with a 6-32 tap drill size is a relatively simple task.

What Size Drill Bit Do You Use for a 6-32 Tap?

When drilling a hole for a 6-32 tap, the general rule of thumb is to use a drill bit that is two sizes smaller than the tap. In this case, you would use a number 36 drill bit. This ensures that the threads will be properly sized and will not be too tight or too loose. It is also important to ensure that the drill bit is sharp and able to create a clean hole. 

Otherwise, the tap may become damaged or the threads may not be properly formed. With a little care and attention, you can ensure that your 6-32 tap will be properly installed and will provide years of reliable service.

What is the Diameter of a 6-32 Hole?

A 6-32 hole is 0.138 inches in diameter. The first number in the 6-32 designation refers to the 0.138-inch diameter of the screw shank, and the second number refers to the threads per inch (TPI) on the screw. A 6-32 hole is therefore a hole that is just barely large enough to accommodate a 6-32 screw. In order to prevent the screw [1] from stripping, it is important not to enlarge the hole beyond its specified size. 

6mm drill hole

When screws are used in applications where they will be subject to high loads, it is often necessary to tap the holes to create threads that are deeper and stronger than those of a standard 6-32 screw. This helps to ensure that the screws will remain securely in place, even under heavy use.


Tap drill sizes are measured in millimeters and correspond to the size of the screw or bolt that they will thread. A 6-32 tap drill size is a metric measurement that corresponds to a 6mm screw or bolt. This size is used for many applications, including metalwork, woodworking, and plastic fabrication. 

It’s important to use the correct tap drill size when creating new threads, as using one that is too small can damage the material and create an inferior connection, while using one that is too large can lead to stripped threads.

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