When it comes to ensuring the stability and safety of heavy-duty structures, selecting the right fasteners is critical. One such fastener that has earned a reputation for its durability and strength is the 316 A4 Expansion Bolt. Available in various sizes, including the 20mm x 75mm configuration, this versatile bolt is essential for applications that require superior resistance to corrosion and exceptional holding power.
What is the 316 A4 Expansion Bolt?
The 316 A4 Expansion Bolt 20mm x 75mm is a type of mechanical fastener designed to anchor objects securely into masonry or concrete surfaces. Made from 316 stainless steel, this expansion bolt offers enhanced resistance to corrosion, making it ideal for use in environments that are exposed to moisture, chemicals, or harsh conditions.
The expansion bolt consists of a bolt, a sleeve, and a cone. When the bolt is tightened, the sleeve expands, creating a strong, secure grip within the hole. This ensures that the bolt will not loosen over time, even under heavy loads or in dynamic environments.
Key Features of the 316 A4 Expansion Bolt 20mm x 75mm
- Corrosion Resistance: The 316 stainless steel construction of the bolt makes it highly resistant to corrosion, particularly in environments with high levels of salt, chemicals, or moisture. This feature makes it perfect for outdoor applications or locations with exposure to the elements, such as coastal areas or industrial plants.
- Durability: The 20mm x 75mm size of the bolt provides an excellent balance between strength and versatility. It is long enough to ensure a secure hold while being compact enough for use in a wide range of applications, from light construction to heavy-duty industrial projects.
- Easy Installation: The expansion mechanism allows for simple installation. When the bolt is inserted into a pre-drilled hole, tightening the bolt causes the sleeve to expand, securing the bolt in place without requiring additional tools or complex installation procedures. This feature saves time and effort, making it an efficient choice for contractors and builders.
- Strong Holding Power: Designed to handle significant loads, the 316 A4 Expansion Bolt 20mm x 75mm can support heavy-duty applications. Whether you’re anchoring machinery, structural beams, or securing fixtures, this expansion bolt provides the necessary strength to ensure long-term stability.
- Versatility: This expansion bolt is suitable for use in a variety of materials, including concrete, brick, and stone. Its adaptability makes it an ideal choice for many different sectors, from construction and manufacturing to civil engineering and infrastructure development.

Applications of the 316 A4 Expansion Bolt 20mm x 75mm
The 316 A4 Expansion Bolt 20mm x 75mm is widely used in industries where high performance and reliability are required. Some common applications include:
- Construction: Securing structural elements such as steel beams, columns, and posts in commercial and residential buildings.
- Marine: Installing fixtures and equipment in marine environments where corrosion resistance is essential due to exposure to saltwater.
- Industrial: Anchoring machinery, storage units, or equipment in factories and warehouses, especially in environments where corrosive substances may be present.
- Infrastructure: Providing secure anchoring for bridges, tunnels, and other critical infrastructure projects exposed to weather and environmental stresses.

Why Choose the 316 A4 Expansion Bolt?
Choosing the 316 A4 Expansion Bolt 20mm x 75mm for your projects ensures that you are investing in a product that delivers both reliability and durability. Its corrosion resistance, strength, and easy installation make it the ideal choice for industries requiring high-performance fasteners.
Whether you’re working on large construction projects or need a reliable bolt for an industrial setting, this expansion bolt will provide the strength and security you need. It’s a must-have for any contractor or professional who values quality and performance.
In conclusion, the 316 A4 Expansion Bolt 20mm x 75mm is a top-tier solution for all your fastening needs. With its corrosion-resistant material, ease of installation, and robust performance, this expansion bolt is perfect for securing heavy-duty applications across a wide range of industries.