What Size Screws Do Motherboards Use?

Screws are very common in the building of computers. They attach motherboards, cases, power supplies, fans… pretty much anything that is part of your computer build.

But what size are motherboard screws? It is obvious they are different from case to case – compare a screw next to a motherboard with how it fits into a power supply – but what is the standard?

Different Sizes For Motherboards Screws

There are two standards for motherboard screws.  The first, M2.5, is an industry size used in many applications besides screwing motherboards into cases. The most common use of this type of screw is in computer mice (especially gaming mice).  It also tends to be the smallest size used; they are very small and thus don’t put much stress on components when installed correctly.

The second standard is 6-32 UNC – universal screw thread form (UNC). It was created by American Unified Screw Threads made up of American National Coarse (NC), National Fine (NF) threads, and the Unified Coarse (UC) threads shared with SAE units.  This standard has been in use since the 1800s.

The largest motherboard screw is 10-24 UNC – which was originally designed for larger items such as chassis, but they have been used to fasten motherboards into cases since the mid 1990’s. A common misunderstanding is that a M10 requires a thicker board than a M4 because it has a larger diameter and thus more area over which to distribute stress. However, these screws have different threads, so their strength comes from how much they can bite into the board rather than how much force can be put on them before failure.

Popular Brands Of Motherboard Screws:

The most popular brands are Philips and Hexagon head screws. They come in different sizes for different types of boards or computer parts. For example, Phillips or flat-headed screws would be used to secure the motherboard while hexagon head ones ought to be used with the case.For more info visit https://motherboardinfo.com/what-size-are-motherboard-screws/

How To Determine What Size Screw You Need?

The diameter and length of the screws should be chosen considering both their material properties as well as their intended application. For example, if the threaded portion of the screw is not long enough to engage a nut or washer fully then it will concentrate stress on a smaller area than originally intended. In addition, if the screw’s head is too small it may strip out or break under high tension. However, since each type of screw has different materials and threading there isn’t an industry standard way to select the proper thickness for a motherboard screw. However, the best method to choose a proper thickness for a motherboard screw is to use an online calculator .

Computer screws come in a variety of shapes and sizes. The most common computer screw is the Phillips head, but flat head and hexagon (or Allen) head screws are also used. Some screws may have specific applications such as motherboard or drive bay mounting screws which can vary in size depending on the application for which they will be used. A motherboard screw must withstand significant loads because it holds components like the CPU, RAM, voltage regulator chips and battery packs in place which can generate heat ranging from high to extreme levels depending on system configuration (for example overclocked CPUs).

Motherboard manufacturer’s specifications state that 6-32 machine screws with thicknesses between .5mm (.020 inches) through .7mm (.028 inches) are recommended. Thicker motherboard screws may be used to mount heat sinks. Using thinner motherboard screws is somewhat acceptable as long as the screw head does not protrude through the surface of the board where it would short against another component’s metal housing, which could happen if too many stand-offs are raised or other components are crowded close together, though this should be avoided because it could cause increased issues with solder joints.

Parts compatibility can also affect screw type selection (not necessarily size) because motherboards use various sizes for threaded holes and some manufacturers may require OEM parts only. Other motherboard manufacturer specifications indicate that power supply mounting holes should use 8-32 x .375″ long machine screws or shorter 6-32 x .375 or longer 8-32 x .437″ long screws.

 

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