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Allen Bolts: Socket Head Design and High-Torque Applications

This page focuses on allen bolts (hex socket bolts), featuring a recessed hexagonal socket in the head for tightening with an allen wrench (hex key). It highlights advantages: high torque application without cam-out, low-profile head for tight spaces, and tamper resistance. Materials (carbon steel, alloy steel, stainless steel) and grades (10.9 for high strength) are discussed, along with applications in machinery, automotive engines, bicycles, and furniture. The content compares them to Phillips/slotted bolts, explains sizing (metric/imperial), and offers tips for installation (avoid over-tightening), making it essential for precision, high-torque fastening in confined spaces.
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Advantages of the product

Exceptional Quality Assurance

Our Allen bolts are manufactured using top-grade materials and undergo rigorous quality control processes. This ensures that every bolt meets international standards, providing you with reliability and longevity in your applications. Our dedication to quality has earned us the trust of clients in over 50 countries.

Customized Solutions for Diverse Needs

We understand that different projects require different specifications. Our team of experts works closely with you to develop customized Allen bolt solutions that fit your unique requirements. Whether you need specific sizes, materials, or finishes, we have the expertise to deliver precisely what you need.

Related products

Allen bolts, also known as hex socket screws, are fasteners characterized by their hexagonal socket drive, which allows for efficient installation and removal using an Allen wrench. These bolts are widely used across various industries, including automotive, aerospace, and construction, due to their strength, durability, and versatility. At Ningbo Yinzhou Gonuo Hardware Co., LTD, we specialize in manufacturing high-quality Allen bolts that meet the stringent demands of international markets.

Our Allen bolts are produced from premium materials such as stainless steel, carbon steel, and alloy steel, ensuring exceptional resistance to corrosion and wear. Each bolt undergoes comprehensive testing to guarantee that it meets the required specifications for tensile strength and hardness. This commitment to quality has positioned us as a trusted supplier in markets like the US, Germany, and Japan.

Moreover, we recognize that each customer has unique requirements. Our team is dedicated to providing tailored solutions, whether you need specific dimensions, coatings, or packaging. By collaborating closely with our clients, we ensure that our products not only meet but exceed their expectations.

In addition to our manufacturing capabilities, we prioritize customer service. Our experienced team is here to guide you through the selection process, offering insights and recommendations based on your project needs. With a focus on mutual benefit and long-term partnerships, we strive to build relationships that foster success for both parties.

Frequently Asked Questions

What sizes of allen bolts and corresponding allen wrenches are common?

Allen bolts come in metric and imperial sizes. Common metric diameters range from M3 to M20, with corresponding allen wrench sizes from 2mm to 14mm (e.g., M3 uses 2.5mm wrench, M6 uses 5mm). Imperial diameters range from 1/4 inch to 1 inch, with wrench sizes from 3/32 inch to 3/8 inch (e.g., 1/4 inch bolt uses 5/32 inch wrench). The wrench size is typically slightly smaller than the bolt’s diameter to fit the socket snugly, ensuring effective torque transfer.

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customer evaluation

Julian Taylor

On my mountain bike, these high-strength allen bolts secure the handlebars and stem, withstanding the shocks from off-road riding. The Grade 10.9 steel provides the necessary rigidity, and the hexagonal socket prevents the key from slipping, even when applying maximum torque. The bolts are lightweight yet durable, and the corrosion-resistant coating has kept them rust-free after muddy rides. A reliable choice for bicycle components that need both strength and precision.

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Unmatched Durability

Unmatched Durability

Our Allen bolts are engineered to withstand extreme conditions, making them ideal for high-stress applications. The use of premium materials ensures that they resist corrosion and wear, providing long-lasting performance.
Tailored Solutions for Every Project

Tailored Solutions for Every Project

We pride ourselves on our ability to offer customized Allen bolts that meet your specific requirements. Our team works closely with you to understand your needs, ensuring that you receive the perfect solution for your project.
Commitment to Customer Satisfaction

Commitment to Customer Satisfaction

At Gonuo, we prioritize our clients’ needs. Our dedicated support team is always ready to assist you, and our focus on building long-term partnerships ensures that we are invested in your success.