In the manufacturing of pressure vessels, pipeline systems, and heavy equipment, bolts and nuts are critical connecting components. Their selection directly impacts structural safety and reliability. Below is a summary of 15 common types of bolts and nuts, including their features and typical application scenarios, for industry reference.

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I. Bolts

1. Hex Head Bolt

· Features: Hexagonal head for wrench tightening, easy installation, and high load-bearing capacity.

· Applications: General machinery, building structures, and basic connection scenarios.

 

2. Allen Bolt

· Features: Hexagonal socket head requiring an Allen key for operation, compact structure, and high fastening force.

· Applications: Precision equipment, mold assembly, and hidden installation scenarios.

 

3. Countersunk Head Bolt

· Features: 90° conical head that can be fully embedded into the workpiece surface for a flat connection.

· Applications: Furniture, construction, and other scenarios requiring flush surfaces.

 

4. Union Bolt

· Features: Enables quick connection and disassembly via a threaded union, facilitating easy maintenance.

· Applications: Pipeline systems and fluid engineering requiring frequent disassembly.

 

5. Flange Bolt

· Features: Integrated flange enlarges the contact area, offering excellent anti-loosening and vibration resistance.

· Applications: Engines, heavy equipment, and high-vibration, high-load environments.

 

6. Square Head Bolt

· Features: Square head disperses shear force, providing outstanding shear resistance.

· Applications: Heavy machinery and structural connections under high shear loads.

 

7. Round Head Bolt

· Features: Round head protrudes after installation, offering a smooth appearance.

· Applications: Furniture assembly, temporary fixes, and scenarios with low aesthetic requirements.

 

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II. Nuts

1. Lock Nut

· Features: Self-locking via friction, providing reliable anti-loosening performance.

· Applications: Engines, transmission systems, and other vibration-prone equipment.

 

2. Round Nut

· Features: Often used with lock washers; interlocks via grooves for axial fixation.

· Applications: Bearing fixation and high-speed rotating equipment.

 

3. Self-locking Nut

· Features: Built-in nylon ring or deformed threads create friction for anti-loosening.

· Applications: Aerospace, automotive manufacturing, and other high-vibration fields.

 

4. Lock Nut / Self-locking Nut

· Features: Mechanical design (e.g., riveting, deformation) prevents loosening.

· Applications: Vehicle chassis, mechanical equipment, and long-term vibration environments.

 

5. Hex Nut

· Features: Hexagonal shape compatible with standard wrenches, highly versatile.

· Applications: Basic fastening in mechanical connections and building structures.

 

6. Claw Nut

· Features: Four-claw structure allows pre-embedding into plates without additional tools.

· Applications: Furniture, composite materials, and embedded connections in non-metallic materials.

 

7. Ring Nut

· Features: Ring design ensures even clamping force and high security.

· Applications: Pressure vessel sealing, bearing fixation in heavy machinery.

 

8. Wing Nut

· Features: Wing-shaped design enables hand-tightening without tools.

· Applications: Laboratory equipment, pipeline connections, and scenarios requiring quick adjustments.

 

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ConclusionSelecting the right bolts and nuts is crucial for ensuring equipment safety and reliability. As a stainless-steel pressure vessel manufacturer, we prioritize the compatibility and reliability of connecting components, providing customized solutions tailored to operational needs.