Checkout
Hex Head Screws and Bolts
Hex head screws, screw with hex head and hex bolts are widely used fastening solution across construction, automotive, engineering and manufacturing industries throughout the UK, especially in applications where screws large head designs provide improved torque and clamping strength. Characterised by their six-sided head, they are designed to be tightened using a spanner or socket, providing strong clamping force and excellent torque control. Our range includes both fully threaded hex set screws and part-threaded hex bolts, available in multiple materials, sizes and finishes to suit a wide range of applications. For customers requiring long-lasting, corrosion-resistant fixings, our selection of stainless steel hex bolts offers superior durability in demanding environments.
What Are Hex Head Screws and Bolts?
Hex head screws and bolts feature a hexagonal head for positive engagement with hand tools or power tools, ensuring secure tightening even under heavy loads. The key difference between the two is thread length: hex set screws are fully threaded, while hex bolts feature a plain shank above the thread. This makes set screws suitable for fastening through thinner materials, while bolts offer improved shear strength for structural applications.
Materials and Finishes
We supply hex head screws and bolts in high-quality materials suitable for various performance requirements:
- A2 Stainless Steel: Ideal for general outdoor use, food production, water systems and corrosion-prone environments.
- A4 Stainless Steel: Enhanced corrosion resistance for marine, chemical and high-exposure applications—perfect when premium stainless steel hex bolts are required.
- Zinc-Plated Steel: A cost-effective, durable option for indoor and non-corrosive conditions.
Styles Available
- Hex Set Screws: Fully threaded for applications requiring maximum adjustment or shorter grip lengths.
- Hex Bolts: Part-threaded for improved shear strength and load-bearing performance.
- DIN, ISO and BS standard variations: Available depending on specification and project requirements.
Common UK Applications
- Construction and structural steelwork
- Automotive repairs, engine components and heavy machinery
- Fabrication, metalwork and manufacturing lines
- Outdoor installations using corrosion-resistant stainless steel hex bolts
- General maintenance, assembly and workshop applications
Whether you require fully threaded hex set screws or precision-engineered hex bolts for structural applications, our team can help identify the correct material, thread size and standard for your project. For expert guidance, call us on 01233 713581.
Need Support?
Frequently Asked Questions
What Are M4 10mm Screws and What Do the Dimensions Mean?
M4 10mm screws are metric fasteners where "M4" indicates a 4mm thread diameter and "10mm" specifies the screw length from head to tip. These M4 10mm screws feature a standard 0.7mm thread pitch (the distance between thread peaks), making them compatible with M4 nuts and pre-tapped holes across various applications. The "M4" designation follows ISO metric standards, ensuring these M4 10mm screws maintain precise 4mm major diameter threading for reliable fastening performance. Our M4 10mm screws are manufactured to DIN 933 standards with fully threaded shanks, providing maximum thread engagement throughout the 10mm length. The hexagonal head design allows for efficient installation using standard 7mm spanners or wrenches, while the A2 stainless steel construction ensures these M4 10mm screws deliver superior corrosion resistance for both indoor and outdoor applications.
What sizes of coach bolts do you sell?
We offer a wide range of coach bolts, including popular lengths like M8 × 75 mm, M10 × 130 mm, M12 × 150 mm, M16 × 120 mm, and longer options such as the M12 × 300 mm coach bolt (DIN 603) in stainless steel — perfect for heavy-duty wood or metal fastening with excellent corrosion resistance via A2 and A4 materials. Our coach bolts feature the standard DIN 603 neck design that locks securely into timber or metal, preventing rotation for a fast, precise fit. As always, you'll benefit from fast same-day dispatch, competitive trade pricing, and expert support to help you choose the ideal size for your project.
When should I choose stainless steel hex bolts over zinc-plated or mild steel options?
Stainless steel hex bolts should be used when corrosion resistance, durability and long-term reliability are essential. They outperform zinc-plated or mild steel bolts in outdoor, marine, chemical, high-moisture and high-wear environments. For structural fixings, machinery and external installations, stainless steel hex bolts provide the best protection against rust and degradation.
Are stainless steel hex bolts suitable for heavy-duty construction or engineering applications?
Yes. Stainless steel hex bolts offer excellent mechanical strength and resistance to corrosion, making them suitable for heavy-duty applications including structural connections, machinery assembly, automotive repairs and outdoor fittings. They are widely used in UK construction and industrial environments where long-term performance is critical.
How fast can I get my order?
Need your parts tomorrow? Our rapid same day dispatch has got you covered! Simply place your order before 4pm Mon-Thurs or 2pm Friday and select our Next Day Delivery service in the shopping cart. We also offer Guaranteed AM delivery when required, in addition to a Saturday delivery option.
If you don't mind waiting, we have a Free delivery method for orders over £30, and an economic £4.85 2nd Class delivery for orders between £20-£30.
Can I get a Free Sample?
Free Samples can be requested through our product pages, displayed in the sizing table beside the product you require. Please note you can always give us a call on 01233 713 581 or contact us on Live Chat to discuss samples.
Do I need to Sign Up for an account?
You do not need to sign up to place an order, but it is recommended if you'd like to gain loyalty points, giving discount off future orders. To learn more about loyalty points, please view our rewards scheme page.
I am not sure what parts I need?
If you're unsure which part you need then please do not hesitate to give one of our friendly Sales Team a call on 01233 713 581 and they can assist you. Alternatively, we're active on Live Chat during office hours. You can open this using the button in the bottom right corner of the website. Alternatively, you can write to us using our contact form.
Do you offer Returns on Products?
We offer a return period on all of our products to give you peace of mind, to view our policies and learn more about this process should it be required, please see our returns policy page.
Can you supply different colours of this product?
In most cases we have the facilities to offer you different colours of a product, specific to your requirements. Minimum order quantities may apply depending on the manufacturing technique in question, but please get in touch with any queries you may have.
Is there a minimum order value?
Please note that there is a minimum order value of £10 through our website (inclusive of VAT).
If you're new to our website you may want to check out our frequently asked questions section for answers to common customer queries.
What do these abbrievations mean?
While browsing the website you may come across abbreviations used for material names that you are unfamiliar with. You can find an explanation for these in our material abbreviations guide.