Proper Nut Tightening Guide – Why Overtightening is Unsafe

Nuts are one of the most common fasteners in mechanical assembly. Many people think “the tighter the nut, the stronger,” but in fact, proper tightening is key to safety and longevity.

As a professional fastener manufacturer, Xinchi is glad to share the principles and precautions of nut fastening.

Risks of Overtightened Nuts

Overtightening nuts in assembly can lead to multiple issues affecting threads, components, and bolts.

1. Nut Thread Damage

Excessive torque can strip threads, making the nut and bolt unusable.

2. Component Deformation or Cracking by Nuts

Thin plates, plastic parts, or aluminum components may crack or deform under excessive nut torque.

3. Bolt Breakage Caused by Nuts

Steel bolts or studs may break if the torque exceeds the yield strength, affecting structural safety.

4. Nuts May Loosen When Too Tight

Stress relaxation or material creep can make overtightened nuts loosen over time.

Summary: Over-tightening nuts may damage threads, deform components, or break bolts. Proper torque ensures safety.

Correct Nut Tightening Methods

Understanding proper nut tightening helps ensure assembly safety and extend component life.

1. Follow Recommended Torque Values for Nuts

Each bolt and nut has a recommended torque value. Using a torque wrench ensures safe tightening.

2. Use Nut Locking Measures

Spring washers, nylon lock nuts, or thread-locking adhesives prevent loosening without excessive torque.

3. Tighten Nuts Evenly

When fastening multiple nuts, tighten in a crisscross pattern to avoid stress concentration.

4. Consider Nut Material Compatibility

Plastic, aluminum, or wooden components require controlled torque to ensure safety and durability.

Summary: Standard torque, locking measures, and material considerations ensure secure and safe nut fastening.

Practical Conclusion for Safe Nut Tightening

Proper torque is more important than blindly overtightening. Correct nut fastening ensures structural safety and prolongs component life.

Using a torque wrench or following standard torque tables is key to secure and durable nut fastening.

Xinchi Fasteners Factory Advantages

As a professional fastener manufacturer, Xinchi Factory provides:

• Production Capacity: 102 cold heading machines, daily output over 10 million nuts.
• Modern Facility: New factory covers 30,000 sqm with two six-story production buildings and advanced management.
• Quality Assurance: Strict ISO/DIN standard production, with every nut inspected for dimension, strength, and surface quality.
• Customization Service: Supports material, coating, thread specification, and special locking requirements.

XINCHI is a trustworthy fastener company, especially in furniture nuts. We have a factory,  founded in 2007. We are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier, XINCHI offers a wide range of high-quality fasteners, including nuts, screws, bolts, rivets, and washers.

Xinchi Fasteners combines technical strength with high-quality standards to provide safe, durable, and reliable nuts for various applications. If you would like to learn more about fasteners or are interested in wholesale fasteners, please do not hesitate to contact us. Our experienced and expert service team will reply as soon as possible.