The Ultimate Guide to Different Types of Nuts and Bolts: A Handy Reference

Whether you're assembling a new piece of furniture, constructing a deck or working on a large-scale construction project, having the right nuts and bolts is crucial. Missteps in choosing the appropriate fasteners can lead to weakened structures, unnecessary delays and added expenses. In this guide, we'll explore the different types of nuts and bolts, offering you insights to help you make informed decisions for your next project.

Nuts are essential components in fastening systems, providing the necessary force to keep parts securely in place. Here's a brief overview of some common types of nuts:

Hex Nuts 

• Types: Standard hex nuts, heavy hex nuts. 
• Sizes: Ranges from M2 to M48. 
• Purpose: General-purpose fastening, providing a firm grip with their six-sided design. 

Lock Nuts 

• Types: Nylon insert lock nuts, all metal lock nuts. 
• Sizes: Typically from M3 to M24. 
• Purpose: Prevent loosening due to vibration, often used in machinery and automotive applications. 

Wing Nuts 

• Types: Standard wing nuts, heavy-duty wing nuts. 
• Sizes: Generally available from M4 to M16. 
• Purpose: Easy to tighten and loosen by hand, ideal for applications requiring frequent adjustments. 



Bolts are equally vital in construction and manufacturing, providing the structural integrity required for assemblies. Here are some common types of bolts and their uses:

Hex Bolts 

• Types: Full thread hex bolts, partial thread hex bolts. 
• Sizes: Typically from M6 to M64. 
• Purpose: Versatile, used in construction, machinery and other applications requiring strong, secure fastening. 

Carriage Bolts 

• Types: Round head square neck, rib neck carriage bolts. 
• Sizes: Typically from M6 to M20. 
• Purpose: Used in wood connections, providing a smooth, rounded head that prevents spinning during installation. 

Lag Bolts 

• Types: Standard lag bolts, hex head lag bolts. 
• Sizes: Typically from 1/4" to 1-1/4" in diameter and 1" to 6" in length. 
• Purpose: Heavy-duty fastening in wood construction, providing a strong hold with their coarse threading.
  

Choosing the right bolts for your project is crucial to ensure durability and strength. The type of bolt you select depends on the specific requirements of your project. Here’s a brief overview of bolts to help you make an informed decision. 

Galvanised bolts are coated with a layer of zinc to prevent rust and corrosion, making them ideal for outdoor use or in environments exposed to moisture. 

These bolts are made from stainless steel, providing excellent resistance to rust and corrosion. They are suitable for both indoor and outdoor projects where aesthetic appeal and longevity are important. 

These bolts are made from high-strength steel, designed to handle heavy loads and high stress. They are commonly used in construction and engineering applications where superior strength is required.

At Kev's Fasteners & Construction Supplies, we pride ourselves on offering a wide range of high-quality nuts and bolts tailored to meet the needs of contractors and builders. Our products are designed to withstand the challenges specific to the construction environment, from extreme weather conditions to heavy-duty usage. Contact us today to explore our fasteners and insulation supplies in Rockhampton!