ThePipingMart Blog Fasteners Lock Nut vs Hex Nut – What’s the Difference

Lock Nut vs Hex Nut – What’s the Difference

Lock Nut vs Hex Nut

Fasteners are a key component in many areas of engineering, from automotive to aerospace. Two of the most common fasteners are lock nuts and hex nuts. While they may look similar, an essential distinction between them should be noticed. Let’s look at the differences between these two types of nuts.

Lock Nut

Lock nuts provide extra security and stability by preventing screws, bolts, or studs from loosening due to vibration and other forces. This is achieved by using either an internal or external thread-locking system requiring special installation or removal tools. Examples of lock nut applications include engines and transmissions, where vibrations can cause bolts to loosen over time.

Hex Nut

Hex nuts are one of the most common fasteners available and are often used in applications such as furniture assembly, automotive repair, and construction projects. The main benefit of hex nuts is their ease of installation; all you need is a wrench or socket wrench for installation or removal. This makes them an ideal choice for quick repairs or adjustments and larger projects requiring multiple fasteners.

Difference Between Lock Nut and Hex Nut

  • A lock nut, also known as a locking nut, is a type of nut that is used to secure a bolt or screw in place.
  • A hex nut is a type of nut that has a hexagonal shape.
  • Lock nuts are made from steel or stainless steel, while hex nuts are made from brass or bronze.
  • Lock nuts are typically more expensive than hex nuts.
  • Lock nuts are more likely to stay in place than hex nuts.
  • Hex nuts are more likely to strip than lock nuts.


In conclusion, lock nuts and hex nuts have unique advantages depending on your specific application needs. Lock nuts are the way to go when extra security and stability are needed against vibration or other forces. However, hex nuts may be your best bet if you need something more versatile with easy installation. Ultimately, it all boils down to understanding your particular application needs so you can choose the right type of fastener for the job at hand!

Related Post