How to Prevent Hex Bolts from Loosening During Use

Hex bolts are a common and important fastening element in engineering and manufacturing. However, in actual use, bolt loosening can be a headache due to vibration, impact, and environmental factors. To ensure the firmness of the connection, we can adopt these appropriate anti-loosening methods.

Friction locking method:

This is a common and effective method. By generating positive pressure between the threaded parts, sufficient friction force is formed to resist the relative rotation of the bolt. It is applicable to most application scenarios and can be achieved by axial or bidirectional tightening.

Methods of preventing loosening by spot welding, riveting, bonding, etc.:

These methods can firmly fix the bolts on the workpiece, but it should be noted that this method may cause the bolts to be damaged during disassembly and is not suitable for situations that require repeated disassembly.

Staking method:

By staking, welding or bonding, the threaded pair loses its active pair characteristics, forming an inseparable connection. The disadvantage is that the bolt can only be used once, and disassembly is very difficult.

Mechanical anti-loosening method:

The mechanical anti-loosening methods using split pins, lock washers, wire ropes, etc. are more reliable and applicable to key connection parts.

Structural anti-loosening method:

The structural anti-loosening method relies on the structure of the bolt itself, such as the Tang screw anti-loosening method. This advanced technology achieves a long-term and stable anti-loosening effect through its own structural characteristics.

Spring washers and thread locking agents:

Spring washers provide additional elasticity, while thread locking agents provide additional resistance when the bolt loosens, especially suitable for high vibration or high humidity environments.

Select the appropriate thread design and torque:

Select the appropriate thread form at the design stage to ensure the use of correct clamping force and torque to prevent over-tightening or over-loosening.

Regular inspection and maintenance:

Periodically inspect the connection parts, timely find and deal with the loose phenomenon, to prevent further damage.

Here are some additional tips for preventing Hexagon head screws from loosening:

Use high-quality bolts and nuts.
Make sure the bolts are the correct size for the application.
Use a torque wrench to tighten the bolts to the correct specification.
Use lock washers or thread locking agents to prevent the bolts from loosening.
Inspect the bolts regularly and tighten them as needed.
By following these tips, you can help to ensure that your hex bolts will stay tight and secure.