Home » Shop » M4 (4mm) Button Head Bolt Allen Socket Screws
£1.28 – £8.84 inc VAT
When it comes to choosing the right bolts for your projects, you want something that ticks all the boxes. And that’s what you’ll get with M4 (4mm) Button Head Bolt Allen Socket Screws from Speciality Metals. These bolts are not only durable and versatile but have low maintenance needs too. And if you’re working on projects that require hygienic properties, they’re the perfect fit. These bolts are corrosion-resistant and offer secure fastening that you can rely on. Look no further than these M4 button head bolts to get your projects off the ground with confidence.
Top quality stainless steel button head bolt supplied straight from Warrington, UK.
Apart from our extensive range of button head screws, Speciality Metals stocks a variety of both standard fasteners and specialist fasteners, including both steel and stainless steel fasteners, nuts and bolts, screws and steel washers.
We ensure that we offer a comprehensive range which meets the needs and requirements of each and every one of our customers, whether you are looking for standard fasteners or something a little more unusual.
Speciality Metals offers M4 (4mm) button head bolt Allen socket screws that are made from 304 grade stainless steel. Because they are low maintenance and have hygienic properties, they are ideal for a variety of industries, including food and medicine. They are corrosion-resistant, as well as providing a secure fit, ensuring the safety and integrity of your project. Count on Speciality Metals’ button head bolts to deliver the quality and performance you need.
We also offer washers that will compliment our range of screws and bolts perfectly.
Key product details:
Speciality Metals is known to be the United Kingdom’s best up-and-coming small-quantity metal company.
Furthermore we stock a vast range of plain wire mesh and perforated metal options that compliment our sheet metal range perfectly.
Over 50,000 customers of Specialty Metals are provided with fast, friendly customer service every year. We’re the place to try when you need metal of any shape and size. We’re based in Warrington, UK. We pride ourselves on our rapid turnaround and a large range of options.
A button head screw, is a type of fastener that has a rounded or dome-shaped head. The head is typically wider than that of a standard screw, which provides a larger bearing surface and is often used for aesthetic purposes as it creates a neat and finished look. The drive type for button head screws can vary, but common ones include hex, Phillips or Torx. Button head screws are used in a variety of applications including machinery, tools and structural assemblies, and are commonly found in automotive, electronic and furniture applications. They are available in a variety of materials, sizes and thread types, including stainless steel, which is commonly used for its corrosion resistance.
Stainless steel 304 grade is one of the most commonly used types of stainless steel and is known for its ability to resist corrosion. The 304 grade contains a significant amount of chromium (18-20%) and nickel (8-10.5%) which allows it to form a passive layer of chromium oxide on its surface that provides a degree of protection against corrosive elements. However, while 304-grade stainless steel button head bolts offer good corrosion resistance in many environments, they are not immune to corrosion. They can be susceptible to pitting and crevice corrosion in chloride environments or when exposed to high temperatures for prolonged periods. Also, in low-oxygen or high-salinity environments, even 304 stainless steel can corrode because the protective oxide layer may not be able to form or maintain itself. Additionally, stress from tension or vibration can lead to stress corrosion cracking in specific conditions. Therefore, while 304-grade stainless steel button head bolts offer good corrosion resistance in many applications, they may not be suitable for all environments, particularly those with high chloride concentrations, high temperatures or low oxygen availability. It’s important to carefully consider the specific application and environmental conditions when selecting the material for your bolts.
Stainless steel button head bolts can be used in marine applications, but it is important to select the appropriate grade of stainless steel. The marine environment is particularly challenging due to the presence of saltwater, which is highly corrosive.
Grade 316 stainless steel is often recommended for marine applications due to its higher resistance to chloride corrosion compared to grade 304 stainless steel. Grade 316 contains molybdenum, which enhances its resistance to pitting and crevice corrosion in chloride environments.
However, even 316-grade stainless steel is not immune to all forms of corrosion in the marine environment, particularly in areas with high salinity, low oxygen or high temperatures. For critical applications or harsh environments, it may be necessary to consider even more corrosion-resistant materials, such as duplex or super duplex stainless steels or to apply additional protective coatings.
It is also important to consider other factors, such as mechanical stress and galvanic corrosion, when selecting fasteners for marine applications.
Architectural and Structural Applications: Used in buildings, bridges and other structures where both aesthetic appeal and resistance to the elements are important.
Automotive Applications: Used in vehicles, particularly in parts exposed to the elements or where a smooth, low-profile head is desired.
Equipment and Machinery: Used in the assembly of equipment and machinery, particularly in the food and beverage, pharmaceutical and chemical industries where corrosion resistance is important.
Electronics: Used in the assembly of electronic devices and equipment where a smooth, low-profile head is desired.
Outdoor Applications: Used in outdoor structures, such as decks, fences and playground equipment, where resistance to the elements is important.
Aerospace: Used in the assembly of aircraft and other aerospace equipment where strength, weight and resistance to the elements are important.
Stainless steel button head screws commonly use an Allen (hexagonal) wrench for installation and removal. This is because the hex socket drive allows for higher torque application compared to other drive types. However, stainless steel button head screws can also be found with other drive types such as Phillips, Torx (star) or slotted, depending on the manufacturer’s design. The choice of drive type will depend on the application and the tools available. Hex and Torx drives are generally preferred for applications requiring higher torque.
Check out our recent article ‘Stainless Steel Sheet Metal: A Helpful Guide’ for a deeper dive into all things stainless sheeting. Our goal for our blogs and help guides is to answer as many questions as possible to help to explain the possibilities of mesh to our customers.
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