A Guide to Cup Square Bolt Dimensions: Sizes & Benefits

Cup square bolts, also known as carriage bolts, are essential fasteners widely used in woodwork, construction, and engineering applications. Their unique design features a domed head and a square section beneath it, which prevents rotation when tightened. This makes them ideal for securely fastening timber, metal, and other materials where a smooth, tamper-resistant finish is required.

At Dinstock, we provide high-quality cup square bolts in various sizes and materials, ensuring durability and performance for a wide range of applications. In this guide, we will explore what cup square bolts are, their available cup square bolt sizes and cup square bolt dimensions, and the benefits of using them in your projects.

What Are Cup Square Bolts?

Cup square bolts are specifically designed for use with wood and metal structures. The square section beneath the domed head fits into pre-drilled holes, locking the bolt in place and preventing it from turning while the nut is tightened. This makes them an excellent choice for applications where a smooth, secure finish is needed.

Common industries that rely on cup square bolts include:

• Timber Construction – Used in wooden structures, fences, and furniture assembly.
• Metal Fabrication – Securing metal plates and components where rotation prevention is needed.
• Automotive and Machinery – Providing strong and reliable fastening in vehicles and equipment.
• Railway and Infrastructure Projects – Ensuring safety and durability in demanding environments.

At Dinstock, we supply cup square bolts that meet industry standards, ensuring strength and longevity in every application.

Cup Square Bolt Sizes and Dimensions

Choosing the right cup square bolt size of cup square bolts is essential for achieving the best performance in your project. Below are the standard cup square bolt dimensions available:

Metric Sizes (Diameter x Length in mm):

• M6 x 20, 30, 40, 50, 60, 70, 80
• M8 x 20, 30, 40, 50, 60, 70, 80, 100
• M10 x 25, 40, 50, 60, 70, 80, 100, 120
• M12 x 30, 50, 60, 70, 80, 100, 120, 150
• M16 x 40, 50, 60, 80, 100, 120, 150

Imperial Sizes (Diameter x Length in inches):

• 1/4” x 1”, 1 1/2”, 2”, 2 1/2”, 3”
• 5/16” x 1”, 1 1/2”, 2”, 2 1/2”, 3”, 4”
• 3/8” x 1 1/2”, 2”, 2 1/2”, 3”, 4”, 5”
• 1/2” x 2”, 2 1/2”, 3”, 4”, 5”, 6”

Cup square bolts at Dinstock are available in various finishes, including zinc-plated, galvanised, and stainless steel for enhanced corrosion resistance and durability.

Benefits of Using Cup Square Bolts

Cup square bolts offer numerous advantages across different applications, making them a popular choice in construction and manufacturing. One of their key benefits is their ability to prevent rotation during installation, thanks to the square section beneath the head, which grips securely into wood or metal. This ensures a firm and stable connection, reducing the risk of loosening over time. Additionally, their domed head provides a smooth, tamper-resistant finish, making them ideal for applications where security and a clean aesthetic are required.

These bolts are highly durable and made from strong materials such as steel, ensuring they can withstand heavy loads and harsh conditions. Their availability in various finishes, including galvanised and stainless steel options, enhances their resistance to corrosion, making them suitable for both indoor and outdoor use. Whether used in construction, automotive, or infrastructure projects, cup square bolts deliver reliable performance, ensuring long-lasting structural integrity. When selecting the right fastener for a project, it’s important to understand the various types of screws and bolts used across different applications.

Why Choose Dinstock for Cup Square Bolts?

As a trusted supplier of industrial fasteners, Dinstock offers:

✔ High-Quality Materials – Manufactured to meet industry standards for durability and performance.

✔ Wide Range of Sizes – From small to large bolts, we stock various options to suit different projects.

✔ Fast and Reliable Delivery – Ensuring your fasteners arrive when you need them.

✔ Competitive Pricing – Affordable solutions without compromising on quality.

✔ Expert Support – Our team is always available to help you select the best fasteners for your application.

Whether you need standard cup square bolts or customised fasteners for specialised applications, Dinstock is your go-to supplier. Get in touch with us today to discuss your requirements and ensure your projects are completed with the highest level of security and reliability.

A Guide to Industrial Fasteners: Types and Applications

Fasteners are the backbone of construction, engineering, and manufacturing. Whether you’re assembling machinery, constructing buildings, or working on automotive projects, using the right type of fastener is crucial for safety, durability, and efficiency. As industrial fastener manufacturers, Dinstock provides a wide range of industrial fasteners that meet stringent industry standards, ensuring reliability in every application. This guide covers the basic types of industrial fasteners, including bolts, nuts, washers, and screws, along with their applications.

Industrial Fastener Manufacturers: Understanding Bolts and Nuts

Bolts and nuts are among the most commonly used fasteners and fixings in industrial settings. Bolts provide a secure method of joining materials, while nuts are used to fasten them in place. They work together to create a strong and stable connection, ensuring structures remain secure.

• Hex Bolts – Commonly used in construction and machinery due to their high tensile strength. At Dinstock, we stock high-quality hex bolts in various sizes and materials to suit different applications.
• Carriage Bolts – Feature a rounded head and are used in wood and metal applications, providing a smooth, secure fit.
• Anchor Bolts – Designed to secure structures to concrete surfaces, essential in large-scale construction projects.
• Flange Nuts – Provide an even load distribution and prevent loosening in high-vibration applications, ensuring long-term reliability.
• Lock Nuts – Used in applications requiring extra security to prevent loosening over time, particularly in heavy machinery.

These fasteners are widely used in industries such as structural engineering, automotive, and heavy machinery manufacturing, where a strong and reliable hold is essential. Dinstock’s range of industrial fasteners is designed to meet the highest quality standards, offering solutions for even the most demanding projects. The UK manufacturing industry is constantly evolving, with new innovations shaping the way industrial components are designed and used. Staying informed about the latest advancements in engineering and production can help businesses make more informed decisions when selecting high-quality fasteners.

Industrial Fastener Suppliers: Role of Washers and Screws

Washers and screws are equally important when assembling components, as they improve stability and distribute pressure evenly. Selecting the right washer or screw from industrial fastener suppliers ensures long-term performance and prevents structural weaknesses.

• Flat Washers – Help distribute load and prevent damage to surfaces, especially in high-pressure applications. Dinstock stocks durable washers made of various materials for enhanced performance.
• Spring Washers – Provide tension and prevent bolts from loosening due to vibration, crucial in construction and industrial equipment.
• Self-Tapping Screws – Cut their thread into materials, eliminating the need for pre-drilled holes, making them highly efficient for assembly work.
• Machine Screws – Designed for precision fastening in equipment and machinery, offering a reliable and secure fit.
• Wood Screws – Ideal for joining wood materials securely without splitting, perfect for carpentry and construction projects.

At Dinstock, we understand the importance of using high-quality fasteners to ensure safety and longevity for industrial fastener suppliers. Our extensive stock of bolts, nuts, washers, and screws allows professionals across various industries to find exactly what they need, with same or next-day delivery available for stock items.

By choosing the right fasteners and sourcing them from trusted industrial fastener suppliers like Dinstock, you can guarantee strength, durability, and performance in every project. Contact us today to find the perfect fastener solutions for your needs.

The Complete Guide on Hexagonal Bolts

Hexagonal bolts, commonly called hex bolts, are among the most widely used fasteners in construction, engineering, and industrial applications. Their six-sided head design allows for easy wrenching, making them a preferred choice for assembling metal, wood, and composite materials. Available in a variety of materials, including stainless steel, high-tensile steel, and brass, hex bolts provide strong and secure fastening solutions. They are often used in conjunction with hex nuts and washers to ensure stability in structural frameworks, machinery, and vehicle assemblies.

Hexagonal Bolt Head Sizes

Hex bolts are manufactured in both metric and imperial sizes to suit different applications. Hexagonal bolt head sizes are determined by three key measurements: the diameter, thread pitch (for metric) thread per inch (for imperial), and length. Common metric sizes range from M5 to M64, with diameters measured in millimetres, while imperial hexagonal bolt head sizes are measured in inches and include sizes such as ¼”, ⅜”, ½”, and ¾”. The length of a hex bolt is measured from the underside of the head to the end of the threaded portion, ensuring accurate fitting based on the required fastening depth.

Hexagonal Head Bolt Dimensions

Hexagonal head bolt dimensions conform to specific standards to ensure compatibility across industries. The most recognised standards for hex bolts include DIN 931 / ISO 4014 (partially threaded) and DIN 933 / ISO 4017 (fully threaded) for metric bolts, while imperial versions follow ASME B18.2.1. The width across flats (AF) – the distance between opposite faces of the hex head – varies based on diameter, with an M10 bolt typically having a 17mm AF measurement and an M16 bolt having a 24mm AF measurement. Additionally, the head height is proportional to the bolt size, ensuring an optimal wrench grip for tightening.

Hexagonal Bolt Specifications

Hex bolts are classified based on material composition and strength grades. In metric fasteners, common strength grades include 8.8, 10.9, and 12.9, with higher numbers indicating greater tensile strength. For example, an 8.8-grade hex bolt is made from medium-carbon steel and is heat-treated for improved durability, while a 12.9-grade bolt is alloy steel, capable of withstanding extreme loads. Stainless steel variants such as A2-70 and A4-80 offer excellent corrosion resistance, making them ideal for marine and outdoor environments. In the imperial system, hex bolts are graded using markings such as Grade 2, Grade 5, and Grade 8, with Grade 8 being the strongest, often used in automotive and heavy-duty applications.

Understanding the flexibility and strength of fasteners, sizes, dimensions, and specifications of hexagonal bolts is essential when selecting the right fastener for your project.  Whether used in machinery, construction, or general engineering, choosing the correct hex bolt ensures structural integrity and long-term performance. Dinstock is a trusted supplier of high-quality industrial fasteners, specialising in precision-engineered solutions for various sectors. With an extensive range of products, including hexagonal bolts, we provide reliable fastening solutions that meet industry standards for strength and durability. If you’re looking for the right hex bolts for your project, get in touch with us today to discuss your requirements.