Hex Bolts

Hex bolts, with their distinctive hexagonal heads, are fundamental fasteners in machinery and construction. Designed to be driven by a spanner or socket wrench, they are used to securely join materials together.

Known for their strength, versatility, and reliability, they are essential to the fastener industry.

While often referred to interchangeably, a standard hex head bolt differs slightly from an allen head bolt, which uses an internal hexagonal drive rather than an external hexagonal head. Because of this internal drive, these need to be tightened with a hex key.

Our Range of Hex Bolts

Various hex bolts are available to meet the needs of diverse industrial and mechanical applications.

Hex Head Bolts

A hex head bolt, also known as a hexagon bolt or hex bolt fastener, features a hexagonal head designed for high-torque applications. These bolts are usually used with nuts for through-hole connections.

Meanwhile, hex cap bolts, a similar component, are installed in pre-tapped holes for blind fastening.

They are commonly tightened using wrenches or spanners to ensure a secure and reliable assembly. Steel, stainless steel, and brass variations provide suitability for various environments and applications.

These fasteners are a staple in construction, machinery, and automotive applications where a strong, reliable joint is needed.

Stainless Steel Hex Head Bolts

Stainless steel varieties of hex head bolts are highly valued for their superior corrosion resistance, making them ideal for high-moisture outdoor and marine environments. They are available in various grades:

• A2 (304): A strong general-purpose option.
• A4 (316): Contains chromium for enhanced corrosion-resistance.

Allen Key Bolts

Allen key bolts, sometimes called Allen head bolts, feature a hexagonal recess in the head for tightening with an Allen key. This design is perfect for tight spaces and precision applications where a spanner cannot reach.

The internal drive provides a clean, low-profile finish, making these bolts common in machinery, automotive, and electronics. They are often made with alloy steel or stainless steel.

How to Choose the Right Hex Head Bolt

When selecting a hex head bolt for your application, consider these factors to ensure the best fit and performance.

Hex Bolt Material

Ensure that the material of your chosen hex head bolt is compatible with the intended environment. Here are some popular options:

• Brass: This copper alloy offers excellent corrosion resistance, making it particularly well-suited for marine environments and applications where rust is a concern.
• Steel: Available in various grades and strengths, steel hex bolts are a versatile and robust choice for general-purpose use where high strength is required.
• Stainless steel: Providing strong corrosion resistance, stainless steel is an ideal material for outdoor applications, low and high temperatures, and humid environments.
• Zinc-plated steel: These are best for indoor use, offering a moderate level of corrosion resistance for dry environments.

Size and Thread Type

Select hex head bolts based on the size of the fastener and its compatibility with nuts and other components. For example, choose an M8 hex bolt to use with an M8 nut to ensure a precise and secure fit.

Load Capacity and Strength Requirements

The load capacity and strength of the fastener are crucial considerations when choosing a hex bolt. For example, high-strength hex bolts are essential to withstand heavy-duty applications like securing machinery or automotive repairs. These bolts are designed to bear significant forces and stress, preventing failure and ensuring the integrity of the assembly.

Common Mistakes to Avoid When Buying Hex Bolts

When choosing hex bolts, it's important to avoid these common pitfalls to ensure the safety and success of your projects.

• Using the wrong material/grade: Mismatching the bolt material and strength to the application can lead to structural failure. For instance, a low-grade bolt in a high-stress, corrosive environment could result in rust and breakage.
• Selecting the incorrect size: Buying hex bolts with the wrong diameter or length can cause an improper fit, leading to insufficient grip, compromised strength, and potential joint failure.
• Using mismatched threads: Overlooking the thread pitch (fine or coarse) or type (metric or imperial) for the mating nut or hole can result in a loose or seized connection, making assembly difficult.
• Ignoring head markings: Many users fail to verify the grade markings on the bolt head. However, these markings are essential for assuring the fastener's quality and strength for the intended application.
• Overprioritising low-cost products: Choosing cheap bolts for critical, high-stress applications can compromise safety and increase the risk of component failure. Always prioritise quality for reliability when buying hex bolts.

Common Applications of Hex Bolts

Construction and Heavy Equipment

Hex bolts are crucial for securing heavy equipment in construction and heavy machinery assembly. They provide structural support for large-scale projects like bridges, buildings, and roads, ensuring stability and safety.

Automotive and Engine Repairs

Hex flange bolts are commonly used in automotive and engine repairs. Their precise tightening is essential for securing critical engine components and other parts that require a strong, reliable, and vibration-resistant connection.

Furniture Assembly

Hex bolts are widely used in furniture assembly, from flat-pack items to custom-built pieces. Small hex bolts are particularly useful for DIY projects, providing a secure and reliable joint for various furniture components and ensuring longevity.

Your Trusted Hex Bolts Supplier and Manufacturer in Australia

RS Australia is a trusted supplier and distributor of hex bolts, providing a comprehensive selection of these essential fasteners. Our products are sourced from reputable brands like ABB, Parker, Schneider Electric, and Goodfellow, ensuring reliable and high-quality options for every project.

Beyond hex bolts, we also offer a wide array of other mechanical components, such as metal rivets and hex nuts, to meet all your fastening and fixing needs.

Explore the full range on our user-friendly online site and have your chosen items delivered right to your doorstep. With our swift and flexible delivery options, we ensure that you receive your items at your convenience.

For more details on delivery times and fees, please consult our delivery information page.