M8 screws are used in various types of hardware to secure equipment and other items. When purchasing fasteners, it is important to know the standardized sizes so that you can purchase the correct size for your application.
The m8 screw size is defined by its nominal bolt shaft diameter of eight millimeters and its default thread pitch of 1.0 mm. If the pitch is not specified, a coarse thread will be assumed.
Size
When selecting the right screw for your project, it’s important to know the sizing specifications of each type. These include the bolt diameter (d), the bolt length, and the thread size. The bolt’s diameter is the width of its shank, excluding the head. It is usually expressed in millimeters (mm). Its pitch is defined as the distance between the peaks of adjacent threads on the bolt’s shank and is measured in units per inch.
Usually, the screw size is indicated on the bolt’s packaging or callout. The callout may also mention the tolerance class, the left-handed symbol (LH), and the screw length.
M8 screws are suitable for a wide variety of applications. However, they are often paired with compatible nuts and washers to ensure a secure fastening. They are commonly used in automotive, machinery, and construction projects. Moreover, they are also used for TV wall mounts to support heavy displays.
Material
Screws are made of a variety of materials. Some are more corrosion-resistant than others, and some have different properties that make them better or worse for specific applications. For example, wood screws are tapered and have coarse threads that screw into wood, while machine screws have precision threading and screw into matching drilled and tapped holes. Sheet metal screws have fine threads and self-thread into thin sheet metal.
Screws can also be produced with different finishes. For instance, stainless steel screws are durable and rust-resistant. Aluminum screws are light and corrosion-resistant, and they can be coated to protect them from oxidation. Brass screws are strong and conductive, while copper alloys have high load capacities and good wear resistance. Finally, chrome plated screws have a shiny, reflective finish and are easy to clean. All of these factors affect the performance of screws, and they should be used appropriately for their intended application. This is especially important if they are subject to heavy loads.
Thread Pitch
The thread pitch of m8 screws is the distance between each thread in the screw. This measurement is important because it determines the thread’s strength and ability to hold a load. It is also used to calculate the diameter of a tapping hole. In addition to the thread pitch, a screw’s head size and material determine its characteristics and application.
The most common screw threads are coarse or fine. Coarse threads are less susceptible to galling and cross-threading, while fine threads are better able to retain their shape.
Metric screws use a different measurement system than standard US fasteners, which are based on threads per inch (TPI). A metric screw’s diameter and thread pitch are both measured in millimeters. The shank diameter is called the major diameter, while the thread diameter is called the minor diameter. To accurately measure these dimensions, you will need a set of digital vernier calipers and a thread gauge. You can find a complete list of ISO metric thread sizes and their corresponding tolerances in BS3643.
Head Length
M8 is a metric screw size and is roughly equivalent to a 5/16 bolt or screw. It has a thread diameter of 8 mm and a head length of about 22 mm. It is most commonly used for securing items that require a low profile. There are a variety of different types of nuts that can be used with M8 screws. Some are taller than others, and some have a different thread depth. These features make it important to understand how to measure the head length of a screw before purchasing.
Metric bolts are typically marked with ‘M’, which stands for metric, and the number, which indicates the size of the shank. The number will also be followed by a letter, which indicates the pitch of the threads. The most common types of metric fasteners include coarse and fine-pitch, although there are several other options available for specific applications. For example, sheet metal screws have a straight thread and are designed to screw into holes that have been drilled into thin sheets of metal.
