What size screws are motherboard screws? Direct Answer in 2023

Motherboard screws are small, thin screws used to attach a motherboard to a computer case. These screws come in a variety of sizes, including M3 (3mm diameter), M2 (2mm diameter), M4 (4mm diameter), and M5 (5mm diameter). 

The size of screws you need will depend on the size of the screw holes on your motherboard and case, as well as the manufacturer's specifications. It is important to use the correct size of screws to ensure a secure and stable connection between the motherboard and case.

Here is a table that provides information on the different sizes of screws that may be used for motherboard installation:

Screw Size	Diameter (mm)	Length (mm)
M3	3	6 or 8
M2	2	5 or 6
M4	4	8 or 10
M5	5	10 or 12
6#	3.5	Various

(Note: These sizes are just a general guide and may vary depending on the specific screws you are using and the manufacturer's specifications.)

Choosing the right size of screws for installing a motherboard is important for ensuring a secure and stable connection.

In this article, we will explore the different types of screws used for motherboard installation and the factors that determine the size of these screws. We will also provide tips for choosing the right size of screws for your specific motherboard and case.

What size screws are motherboard screws?

image source: wikipedia

Overview of motherboard screws:

Motherboard screws are small, thin screws that are used to attach a motherboard to a computer case. These screws are typically made of metal and come in a variety of sizes.

The size of the screws you need will depend on the specific type of motherboard and case you are using. It is important to use the correct size of screws to ensure a secure connection between the motherboard and case, as well as to prevent any damage to the components.

 

Types of screws used for motherboard installation

M3 screws:

M3 screws are the most common type of screws used for motherboard installation. They are 3mm in diameter and typically have a length of 6mm or 8mm.

M3 screws are compatible with most motherboards and cases, and are often included with the motherboard when you purchase it.

M2 screws:

M2 screws are slightly smaller than M3 screws, with a diameter of 2mm and a length of 5mm or 6mm. These screws are less common than M3 screws, but may be used in some cases where space is limited or where a smaller screw is required.

#6–32 screws:

6# screws, also known as 6-32 screws, are a common size of screws used in the United States and Canada. These screws have a diameter of 0.138 inches (3.5mm) and a thread pitch of 32 threads per inch. They may be used for motherboard installation in some cases, although they are generally not as common as M3 or M2 screws. 

The length of 6# screws can vary, with common lengths including 3/8 inch (9.5mm), 1/2 inch (12.7mm), and 5/8 inch (15.9mm). It is important to choose the correct length of 6# screws to ensure a secure and stable connection between the motherboard and case.

Other sizes of screws:

In addition to M3 and M2 screws, there are other sizes of screws that may be used for motherboard installation. These include M4 screws (4mm in diameter) and M5 screws (5mm in diameter). These larger screws may be used in some cases where extra support is needed, such as for heavy graphics cards or other components.

 

Factors that determine the size of motherboard screws

Compatibility with the motherboard:

The size of the screws you need for your motherboard will depend on the size of the screw holes on the motherboard itself. Each motherboard will have specific screw holes that are designed to fit certain sizes of screws.

Be sure to check the manufacturer's specifications or the documentation that came with your motherboard to determine the correct size of screws.

Compatibility with the case:

The size of the screws you need will also depend on the size of the screw holes in your computer case. Some cases have larger screw holes that can accommodate multiple sizes of screws, while others have smaller screw holes that are only compatible with specific sizes of screws.

Again, be sure to check the manufacturer's specifications or the documentation that came with your case to determine the correct size of screws.

Personal preference:

In some cases, you may have the option to use different sizes of screws depending on your personal preference. For example, you may choose to use M3 screws even if your case has screw holes that are compatible with M2 screws.

However, it is important to keep in mind that using the wrong size of screws can cause problems with the stability and security of your motherboard connection.

Tips for choosing the right size of motherboard screws 

Measure the screw holes on your motherboard and case: 

One of the best ways to determine the size of screws you need is to measure the screw holes on your motherboard and case.
You can use a caliper or a ruler to measure the diameter of the screw holes, and then compare this measurement to the sizes of screws available.

Check the manufacturer's specifications:

The manufacturer's specifications or documentation that came with your motherboard and case will usually provide information on the size of screws that are compatible with these components.
Be sure to check these sources to ensure that you are using the correct size of screws.

 

Consider the size of your hands and tools:

If you have larger hands or are using tools with thicker handles, you may find it more comfortable to use larger screws.
On the other hand, if you have smaller hands or prefer to use tools with thinner handles, you may prefer to use smaller screws.
Keep in mind, however, that the size of the screws you choose should still be compatible with the screw holes on your motherboard and case.

Conclusion 

In summary, the size of screws used for motherboard installation will depend on a variety of factors, including the size of the screw holes on the motherboard and case, as well as personal preference. M3 screws are the most common type of screws used for this purpose, but other sizes such as M2, M4, and M5 may also be used in some cases. 

In the United States and Canada, #6–32 screws (0.138 inches in diameter) may also be used for motherboard installation. 

It is important to choose the correct size of screws to ensure a secure and stable connection between the motherboard and case, and to prevent any damage to the components. 

Be sure to check the manufacturer's specifications or the documentation that came with your motherboard and case to determine the correct size of screws to use.