stainless steel socket button head screws ISO 7380-1
Key Highlights
- The ISO 7380-1 standard specifies the characteristics of socket button head screws, including their dimensions, tolerances, and mechanical properties.
- Various industries, such as manufacturing, electronics, and construction use these screws for their low profile and sleek appearance.
- These screws are made from various materials like stainless steel or steel with various finishes.
- The ISO 7380-1 standard ensures these fasteners meet stringent quality and performance benchmarks, making them reliable for demanding applications.
- When selecting socket button head screws, factors like material, finish, and size are important considerations to meet specific application needs.
Introduction
In the world of fasteners, socket button head screws are right up there with some of the most commonly used types. They combine usefulness with great looks and meet the ISO 7380-1 standard in manufacturing.. This guide will look closely at them, we will discuss their features, benefits, uses, and more.
People often refer to them as socket dome head screws due to their rounded dome shaped head, or simply a button head socket screw.
Let’s dive in a little further and find out more about these useful screws.
Understanding The Basics Of Socket Button Head Screws ISO 7380-1
If you were to look at socket button head screws, or button head socket screws, the most obvious stand out feature is they a have a unique low-profile, dome-shaped head. Hence the name dome head screws. They also have an internal hexagonal socket drive,. This design helps you tighten them with high torque using an Allen key or a hex wrench.
As part of the socket screws family of fasteners, what makes them stand out from other types is their smooth rounded dome shape.
People like these screws because they offer a neat and tidy look. Designers often specify them for projects that require a clean, tidy finish. Their smooth dome shape helps prevent snagging, making them ideal for many uses.
Manufacturers produce these to the ISO standards of ISO 7308-1. You can also read Metric Thread Tolerances – Your Complete Guide to learn more about metric thread tolerances and how they apply to the ISO 7380-1 spec.
Characteristics of Socket Dome Head Screws
Socket dome head screws, another name for socket button head, feature a rounded top that provides a more decorative finish compared to other types. People commonly use these screws in applications where aesthetics are a priority due to their sleek appearance.
You will almost always find these fully threaded as standard, it is quite rare that you will ever find them with a partial thread regardless of how long the actual screw is.
Due to their lower profile than a DIN 912 cap screw, the hex recess is not quite as deep meaning that the engagement on the hex key will not be quite as good. If they need to be tightened hard then it would be worth weighing up whether the looks of a dome head screw was preferred or the extra depth of the recess on a cap screw was needed. To further explain the differences in head height, a DIN 912’s is the same height as the thread diameter, whereas an ISO 7380-1 is half of the thread diameter.
Key Advantages of Socket Button Heads
One big benefit of socket button heads is that they allow users to tighten them with a fairly high force, creating a strong and secure joint. The hexagonal socket drive helps to transfer force effectively. This is very important in places where there might be vibration or movement. To further enhance their resistance to vibration, they can be used in combination with a shakeproof washer.
Their wider load bearing than some other types heads helps to distribute the load further which in itself helps to prevent loosening.
If used in an application where space is limited above them, one big advantage is that they can be secured with a ball end hex key, this means that the angle at which they are tightened can be offset. Then when it is screwed in far enough, if there is the space, you could turn the key around and finish off tightening with the leverage of the long end of the key.
As well as the obvious aestetics element of their design, they also offer a degree of safety due to the lack of sharp pointy edges compared to other types.
self colour socket button head screws
Common Uses:
ISO 7380 are specified for a wide range of applications and can be found in many products worldwide, some examples of which are as follows.
In electronics, manufacturers widely use them on casings and panels to give products a clean, tidy finished appearance. Additionally, when used in stainless steel, they offer a shinier more decorative look.
Furniture manufacturers often use them on their products for some of the reasons mentioned above like their low profile look and the lack of snagging. They also add to visual appeal that is desired in furtniture manufacturing.
Manufacturers commonly use these in automotive and motorcycle applications where presentation is key. People also use these to replace the standard bolts that come on the vehicle. This enhances the looks and appearance compared to the standard manufacturers choice.
Various types of machinery will also have button heads used in their assembly, especially in areas that are visible like external covers or guards etc.
Difference Between ISO 7380-1 and ISO 7380-2
ISO 7380-1 and ISO 7380-2 are both variants of socket button but have notable distinctions. ISO 7380-1 is the standard type like we have discussed above, whereas ISO 7380-2, also known as a flange button head has an inbuilt flange.
The diameter of the flange is greater than that on the standard ISO7380-1 which opens up the uses for these to many more applications. This inbuilt flange can be helpful to spread the load if you are tightening them down onto softer material. When used with a penny washer or a repair washer, this can be further enhanced. Or where a larger hole needs to be covered up underneath it is not uncommon for these to be used.
Both take the same size of hex key and share the same overall height but the main difference is the added diameter of the flange on the IS0 7380-2.
Common Materials Used To Produce ISO 7380
As with other types of socket screw, the main materials used to manufacture them are all fairly standard. Stainless steel is a common option, especially when they will be used outdoors. A good every day option is A2 stainless. But if they will be subject to marine conditions or used near the coast then it is wise to opt for A4 stainless steel. Stainless also tend to not have head markings and usually look a little more polished adding to the aestetic appeal.
If you need high tensile stainless steel then it may be worth talking to us about BUMAX as they offer what they call the worlds strongest stainless steel fasteners.
The other most common option would be self colour steel or zinc plated steel, typically in high tensile 10.9 grade. A 10.9 self colour high tensile button head although looks good straight from the packet will offer zero resistance to corrosion and should be used only where corrosion is not an issue or where it does not matter. Zinc plated high tensile button head on the other hand offer a little more protection from rust than the self colour version.
Steel erectors or anybody permanently fixing something outdoors may also look to use galvanized steel socket buttons due to their high strength and high resistance to corrosion.
Other common materials would include nylon and aluminium, each having their own unique uses.
It is important to think about where you will be using them and also what conditions they will be subject to when deciding on the appropriate material you select.
A recap of the common materials you can find socket button head in.
- A2 stainless steel socket button
- A4 stainless steel socket button
- Zinc plated high tensile socket button
- Self colour high tensile socket button
- Galvanized steel
- Aluminium
- Nylon
Understanding The Specifications of Socket Button Head Screws
When choosing the correct dome head screws for your project it’s important to understand their specifications. This helps you pick the right fastener for your task. The ISO 7380-1 standard outlines important details like thread diameter, length, thread pitch, head size and hex key size. These details help you ensure that the fastener fits well, can carry the right load, and works with your application.
The strength of the material, shown by property classes like 10.9 or A2-70, is also important. It shows how well the screw can handle the required forces. You should also think about the thread type, whether it is coarse or fine, and the size of the drive. Usually these screws are only found in metric course but it need be they could be manufactured in a fine thread to your requirement
To measure the length of them you would measure from the underside of the head to the end of the threads.
The IS0 7380-1 Spec
Here is a basic table that shows some of the important dimensions of ISO 7380. Directly below it, you can download a full colour more detailed version to keep for your records.
|
Size |
Head Diameter (mm) |
Head Height (mm) |
Key Size (mm) |
Key Engagement (mm) |
|
M2 |
3.5 |
1.3 |
1.3 |
0.8 |
|
M2.5 |
4.5 |
1.5 |
1.5 |
1 |
|
M3 |
5.7 |
1.65 |
2 |
1.04 |
|
M4 |
7.6 |
2.2 |
2.5 |
1.3 |
|
M5 |
9.5 |
2.75 |
3 |
1.56 |
|
M6 |
10.5 |
3.3 |
4 |
2.08 |
|
M8 |
14 |
4.4 |
5 |
2.6 |
|
M10 |
17.5 |
5.5 |
6 |
3.12 |
|
M12 |
20.1 |
6 |
8 |
4.16 |
|
M16 |
28 |
8.8 |
10 |
5.2 |
|
M20 |
35 |
11 |
12 |
6.87 |
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Conclusion
In conclusion, the more you know about Socket Dome Head Screws ISO 7380-1 the better. You’ll have everything you need to make the right choice for your project.
People often select them for their appearance when they want a more decorative finish to their work. The material chosen will be based on the conditions that they will be subjected to, possibly stainless for outdoors and a more shinyer look or high tensile where more strength is needed.
As always, we are happy to answer any questions that you might have, just give us a shout. If you want more help or need an ISO 7380-1 dimensions chart PDF, contact our experts today.
Frequently Asked Questions
Where Can I Find An ISO 7380-1 Dimensions Chart PDF?
We have an option above for you to download one yourself. Alternatively, just give us a shout any time and we will email you one over that you can keep on file.
Where Are Socket Button Head Screws Commonly Used?
Many industries use socket button head screws for various purposes. You can find them in electronics, manufacturing, furniture assembly, automotive, and aerospace. They are great when you need a low profile and a strong grip.
What is a socket button head screw?
A socket button is a type of metal fastener with a rounded, dome shape, often referred to as a dome head screw. They feature a hex-shaped hole to accommodate an Allen key for tightening. Manufacturers can make them from various materials, with steel and stainless steel being the most common.
When to use button head screws?
They are perfect when you want a low-profile and good-looking fastener. They are best for places where the look is important or where you need something that will not snag other parts etc.
What are Button Head Socket Screws?
Also known as dome head screws, they are fasteners that have a rounded top and a hex hole in the middle for tightening them using an Allen key. They offer a smooth look, which makes them a favourite choice for many uses.
What are socket button head screws used for?
People use socket buttons for many different purposes. They help hold parts together in electronics. They are also great for building furniture and machinery. Their rounded, dome shape and strong grip make them a flexible option for many applications.
How do socket button head screws differ from other types of screws?
Socket buttons, with their appealing dome shape, are often called dome head screws and are tightened using a hex key. The shape of the dome is fairly unique, the closest other option being a pan head which does not have quite the same aestetic look as these.
What are the advantages of using socket button head screws in certain applications?
Advantages of socket button screws are their low profile and dome shaped design. Due to their heads being wider than some other types they are good for spreading the load a liitle better.
Can socket button head screws be reused or are they one-time-use only?
You can reuse them, but it depends on a few factors. This depends on factors like the material, the torque applied, and the conditions of use. Over-tightening or exposure to tough environments can affect their reliability when reused. Be sure to inspect the threads carefully to confirm they are suitable for reuse.
Are Dome Head Screws The Same As a Button Head Screw?
Yes, dome head screws and button head screws are the same thing, in the world of fixings and fasteners, people have many different names for the same things.
What Is An ISO 7380 Screw?
An ISO 7380 screw is a type of socket screw, they are based on the ISO 7380 standard. This standard outlines the sizes and allowed tolerances in their design. For a full overview, please read the above article.