a complete guide to threaded bars

Threaded Bars / Threaded Rods: A Comprehensive Guide

Threaded Rods / Threaded Bars: A Comprehensive Guide

In this article, we'll discuss what threaded bars are, how they are utilised, the diverse projects they can be incorporated into, the sizes they come in, and how to accurately measure them.

Despite their simplicity in appearance, threaded bars play a crucial role in ensuring the stability, durability, and versatility of various projects.

What are Threaded Bars?

Threaded bars, also known as threaded rods, studs, or studding, are straight metal rods with threads cut into both ends or along the entire length. These threads are typically standardised to fit nuts or other threaded components securely.

Threaded bars are commonly made from materials such as steel, stainless steel, brass, or aluminium, each chosen for its specific properties like strength, corrosion resistance, or conductivity.

What is the Difference Between Threaded Bar and Rebar?

While both threaded bars and rebar are used in construction, they serve different purposes. Threaded bars feature continuous threading along the entire length and are primarily used for creating connections or providing structural support. Rebar, on the other hand, typically has raised ridges or deformations along its surface and is primarily used to reinforce concrete structures.

this is rebar

What is the Difference Between a Bolt and a Threaded Rod?

While both bolts and threaded rods feature threading, they serve different functions. Bolts are fasteners that typically have a head on one end and threading on the other. They are used to securely join two or more components together by passing through pre-drilled holes and engaging with nuts. Threaded rods, on the other hand, are continuous rods with threading along the entire length. They are often used to create custom-length bolts, provide structural support, or serve as anchor points for various applications.

Using Threaded Bars

Threaded bars serve a multitude of purposes across various industries and applications. Their primary function is to provide a stable connection between two or more components. They are extensively used in construction, manufacturing, automotive, aerospace, and DIY projects. Some common applications include:
  • Structural Support: Threaded bars are often employed in construction to reinforce concrete structures, such as bridges, buildings, or highways. They can be used as anchor bolts, tie rods, or bracing elements to enhance stability and withstand external forces.

  • Fastening Components: Threaded bars, when paired with nuts and washers, serve as fasteners to securely join different parts together. This application is prevalent in assembling machinery, furniture, and fixtures.

  • Alignment and Adjustment: In certain projects, threaded bars are used to align or adjust components by applying tension or compression. For instance, in the assembly of machinery or industrial equipment, threaded bars facilitate precise positioning and alignment.

  • Custom Fabrication: Threaded bars offer versatility in custom fabrication projects. They can be cut, welded, or bent to suit specific requirements, making them indispensable in the creation of custom fixtures, brackets, or supports. 

Sizes and Measurement

Threaded bars are available in a range of sizes to accommodate diverse project needs. The standard sizing is typically specified by diameter and thread pitch. Common diameter sizes range from as small as 6mm to as large as 24mm, while thread pitches can vary from coarse to fine, depending on the intended application.

Measuring threaded bars accurately is essential to ensure compatibility with other components. To measure a threaded bar, follow these steps:

  1. Determine Diameter: Use a calliper or a ruler to measure the diameter of the threaded bar. Measure across the widest point of the shaft for accurate results.
  1. Count Threads per Inch: Count the number of threads within one inch of the threaded portion. This count will determine the thread pitch, which is crucial for selecting compatible nuts or threaded components.
  1. Verify Length: Finally, measure the overall length of the threaded bar from end to end. Ensure to include the threaded portions on both ends if they are present.

Example: How Thick is M12 Threaded Bar?

The "M12" designation refers to the diameter of the threaded bar, with "M" indicating metric sizing. In the case of M12 threaded rod/bar, the diameter is 12 millimetres. It's essential to accurately measure the diameter for compatibility with other components.

Another example is M16 threaded rod, which has a diameter of 16mm and is made from A2 stainless steel. 

Advanced Applications for Threaded Rods

As technology evolves, so do the uses and applications of threaded rods. Beyond traditional construction and manufacturing settings, threaded rods are finding their way into cutting-edge projects and innovative solutions across various industries.

One of which is in renewable energy infrastructure. They are used to support the installation of solar panel arrays, wind turbine towers, and hydroelectric systems due to them providing robust anchoring and structural support in renewable energy projects that aim to harness clean and sustainable sources of power.

As much of this infrastructure is outdoors, stainless steel rods are far more popular due to their corrosion resistance that helps their longevity when exposed to wind and rain over long periods. 

In Summary

Threaded bars may seem unassuming, but their significance in various projects cannot be overstated. From providing structural reinforcement to facilitating precise fastening and alignment, threaded bars are indispensable in construction, manufacturing, and DIY endeavours.

Understanding their functionality, applications, sizes, and measurement techniques equips individuals with the knowledge needed to leverage their versatility effectively.

At the time of writing, the largest size we have available is M24 threaded rod in stainless steel.

Whether you're erecting a skyscraper, assembling furniture, or fabricating custom fixtures, threaded bars are there to lend their strength and reliability to your endeavours.

Threaded Bars FAQ's

1. Are there specific applications where threaded bars are not recommended or suitable?

Threaded bars may not be suitable for applications where precise alignment or movement is required, as their rigid structure may limit flexibility compared to other fastening methods like hinges or pivots.

2. Can threaded bars be used in outdoor or corrosive environments, and if so, are there specific materials or coatings recommended for longevity?

Threaded bars can be used in outdoor or corrosive environments, but it's essential to choose materials such as stainless steel or galvanised steel and utilise corrosion-resistant coatings to ensure longevity and prevent rusting.

3. Are there any safety considerations or precautions to be aware of when working with threaded bars, especially in high-load or critical structural applications?

When working with threaded bars in high-load or critical structural applications, it's crucial to ensure proper tightening of nuts to the recommended torque specifications to prevent overloading or structural failure. Additionally, regular inspection and maintenance are necessary to detect any signs of wear, fatigue, or loosening.

4. What are some common techniques or tools used for cutting, bending, or modifying threaded bars to fit specific project requirements?

Common techniques for cutting threaded bars include hacksaws, bolt cutters, or power tools equipped with metal-cutting blades. Bending can be achieved using specialised tools like pipe benders or hydraulic presses. Additionally, threading or re-threading can be done using dies and threading machines.

Watch this video showing how to safely cut threaded rods.

5. Are there any industry standards or regulations governing the use of threaded bars in construction or other applications?

Yes, various industry standards and regulations, such as those established by organisations like ASTM International or ANSI (American National Standards Institute), provide guidelines for the manufacturing, testing, and application of threaded bars in different industries. Compliance with these standards ensures the quality and safety of threaded bar usage.

Back to blog