M8 Button Head Bolt Screws

Top quality stainless steel M8 button head bolt screws 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.

Looking for a reliable and versatile solution to your fastening needs? Look no further than the M8 button head bolt from Speciality Metals. The bolts are made of high-quality, 304-grade stainless steel, which offers unparalleled durability and corrosion resistance. In addition, they are hygienic, so they are ideal for food processing and medical applications. The button head design ensures a secure fit, and the allen socket included simplifies installation and maintenance. You can rely on the M8 button head bolt to deliver whether you need a fastener for a specialised application or a general purpose solution for your business.

We also offer washers that will compliment our range of screws and bolts perfectly. 

Key product details:

• Standard – DIN 912
• Fasteners Type – Button Head Allen Socket Bolt Screw
• Shape – Round
• Drive Style – Allen Key
• Thread Diameter – M8 (8mm)
• Screw Length – Various
• Metal – Stainless steel grade 304 (A2)

Why Choose Speciality Metals

• FREE UK delivery on all orders
• Order dispatch within 24 hours of order
• Located in Warrington, UK which is the UK home of mesh and metals
• Our experienced staff are experts in the mesh market and care personally about your customer experience

Furthermore we stock a vast range of plain wire mesh and perforated metal options that compliment our sheet metal range perfectly.

Can Stainless Steel Button Head Bolts be Removed and Reused?

Stainless steel button head bolts can often be removed and reused, but there are several factors to consider:

1. Condition: The bolts should be in good condition, with no signs of wear, corrosion or deformation. The threads should be intact and free from galling or stripping.

2. Application: If the bolts were used in a high-stress or critical application, reusing them may not be advisable without first inspecting them for wear or fatigue, and possibly conducting tests to ensure they meet the required specifications.

3. Torque: If the bolts were torqued to their yield point or beyond, reusing them is generally not recommended as they may have undergone plastic deformation.

4. Coatings or Thread Lockers: If the bolts were used with thread lockers or other types of adhesives, removal may be more difficult and the adhesive will likely need to be reapplied upon reuse.

5. Material Compatibility: If the bolt was used in an environment where it was exposed to corrosive substances, inspect it carefully for signs of corrosion before reusing.

6. Manufacturer Guidelines: Always refer to the manufacturer’s guidelines or engineering specifications when considering reusing fasteners. Some manufacturers provide specific guidelines on whether and how their products can be reused.

7. Application Requirements: Some applications, especially critical ones like aerospace or automotive safety components, may have strict regulations prohibiting the reuse of fasteners.

8. Inspection: Before reusing, it’s a good practice to clean the bolt and inspect it carefully for any signs of wear, fatigue or other damage. Some industries require formal inspections and documentation before a fastener can be reused.

9. Retightening: When reusing a bolt, ensure that it is retightened to the appropriate torque specifications using a calibrated torque wrench.

10. Consult an Expert: When in doubt, consult an engineer or other qualified expert to determine whether it is safe and appropriate to reuse the bolt in the specific application.

What is the Maximum Temperature that Stainless Steel Button Head Bolts can Withstand?

The maximum temperature that stainless steel button head bolts can withstand depends on the specific grade of stainless steel used. 

1. 304 Stainless Steel: This grade is commonly used for general-purpose applications and can withstand temperatures up to approximately 870°C (1600°F).

2. 316 Stainless Steel: This grade offers better resistance to chloride corrosion and can generally withstand temperatures up to approximately 925°C (1700°F).

3. 321 Stainless Steel: This grade contains titanium stabilizers and can withstand temperatures up to around 900°C (1652°F), offering improved intergranular corrosion resistance at elevated temperatures.

4. 410 Stainless Steel: This is a martensitic stainless steel grade, and it can generally withstand temperatures up to around 650°C (1200°F).

5. A2 (equivalent to 304) and A4 (equivalent to 316) Stainless Steel: These are common European grades, with temperature tolerances similar to their 304 and 316 counterparts.

It’s crucial to consider that the above temperature limits are general guidelines and the actual performance can vary based on several factors like the manufacturing process, the presence of corrosive agents and stress on the bolts. Long-term exposure to elevated temperatures can also affect the mechanical properties of the bolt, like tensile strength and yield strength, potentially leading to bolt failure.

Can Stainless Steel Button Head Bolts be Used in Food Processing Equipment?

Yes, stainless steel 304 grade button head bolts can be used in food processing equipment. Stainless steel 304, also known as A2 stainless steel, is one of the most commonly used stainless steel grades and is considered safe for use in food processing and preparation. It has excellent resistance to a wide range of environments and is resistant to corrosion from most food-processing environments (except for environments with high chlorine content or high levels of salt). It also doesn’t affect the flavor of food and resists bacteria and germs, which makes it hygienic. This grade of stainless steel is commonly used in kitchen appliances, utensils and other food preparation equipment.

Can Stainless Steel Button Head Bolts be Used in Marine Environments?

Stainless steel button head bolts can be used in marine environments, but it is crucial to select the appropriate grade of stainless steel. The marine environment is highly corrosive due to the presence of saltwater, which can cause pitting and crevice corrosion in stainless steel. Grade 316 stainless steel, also known as A4 stainless steel, is often recommended for marine applications as it has higher resistance to chloride corrosion compared to grade 304 or A2 stainless steel. Grade 316 contains molybdenum, which enhances its resistance to pitting and crevice corrosion in chloride environments. However, even 316 grade stainless steel may suffer from corrosion in extreme conditions, such as in warm, chloride-rich, oxygen-poor environments.

Are Stainless Steel Button Head Bolts Suitable for Structural Applications?

Stainless steel button head bolts can be used in structural applications, but there are several important considerations to keep in mind.

1. Strength: Button head bolts have a lower tensile strength compared to hex head bolts or socket head cap screws, due to their smaller cross-sectional area. Therefore, they may not be suitable for high-strength structural applications.

2. Corrosion Resistance: Stainless steel provides excellent corrosion resistance, which is beneficial for structural applications exposed to corrosive environments. However, the specific grade of stainless steel should be selected based on the environment to which the structure will be exposed.

3. Size and Load Requirements: The size and load requirements of the application must be considered when selecting the bolt. The bolt must be appropriately sized and graded to handle the loads to which the structure will be subjected.

4. Building Codes and Regulations: Building codes and regulations often specify the types of fasteners that must be used for structural applications. It is essential to consult the relevant codes and regulations to ensure that the selected fasteners are appropriate for the intended application.

5. Installation: Proper installation of the bolts is crucial for ensuring the structural integrity of the application. The bolts must be installed according to the manufacturer’s recommendations and any applicable standards or regulations.

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