A Comprehensive Guide to Bolts: Types, Applications and Selection

Hex Bolts: The Industry Standard

Hex bolts are the most common type of bolt used in industrial applications, featuring a six-sided head that provides excellent torque transfer.

Key Features:

Six-sided hexagonal head for secure wrench grip

Available in full thread or partial thread versions

Standard sizes from M3 to M64 and larger

Strength grades: 4.6, 5.6, 8.8, 10.9, 12.9

Common Applications:

Construction: Structural steel connections, building frameworks

Manufacturing: Machinery assembly, equipment installation

Automotive: Engine components, chassis assembly

Infrastructure: Bridges, railways, power plants

hangfan Advantage: Our hex bolts are manufactured to strict tolerances with consistent thread quality and surface finish.

Flange Bolts: Integrated Washer Design

Flange bolts feature an integrated washer-like flange under the head, eliminating the need for a separate washer.

Key Benefits:

• Built-in flange provides larger bearing surface
• Distributes load more evenly
• Prevents damage to mating surfaces
• Saves time during installation
• Typical Applications:
• Pipe flanges: Oil, gas, and water pipeline connections
• Heavy machinery: Agricultural and construction equipment
• Automotive: Exhaust systems, transmission components
• Marine: Boat hulls, engine mounts
• Specialty and Custom Bolts
• Specialty bolts are designed for specific applications requiring unique configurations.

Carriage Bolts

Square neck prevents rotation during installation

Smooth rounded head for safety

Ideal for wood-to-metal connections

Eye Bolts

• Loop head for attaching cables or ropes
• Used for lifting and suspension applications
• Available with different thread lengths

U-Bolts

• U-shaped design for pipe and tube clamping
• Used for securing pipes, rods, and cables
• Available in various sizes and materials

Custom Bolts

At hangfan, we specialize in manufacturing custom bolts to meet unique requirements:

• Non-standard sizes and lengths
• Special thread configurations
• Custom head designs
• Unique materials and coatings
• Material Selection for Bolts
• Carbon Steel
• Most economical option
• Suitable for general applications
• Available with various coatings (zinc, galvanized)
• Stainless Steel
• Excellent corrosion resistance
• Ideal for outdoor and wet environments
• Grades: 304, 316, 201,DIY
• Highest strength option
• Suitable for high-stress applications
• Heat treatable for specific properties

Bolt Selection Guide

Consider these factors when selecting bolts:

1. Application Requirements: Load, environment, temperature
2. Material Compatibility: Match bolt material to mating surfaces
3. Strength Needs: Choose appropriate grade based on load requirements
4. Installation Conditions: Access, tools available, assembly method
5. Cost Considerations: Balance performance with budget

Conclusion

1. Selecting the right bolt is essential for ensuring safety, reliability, and performance in any application. Whether you need standard hex bolts, specialized flange bolts, or custom-designed fasteners, hangfan has the expertise and products to meet your needs.
2. Our commitment to quality manufacturing and customer satisfaction makes us the ideal partner for all your bolt and fastener requirements. Contact hangfan today to learn more about our complete range of bolt solutions.