Galvanised Bolts

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Galvanised bolts are designed for applications where strength and long term corrosion resistance are essential. They are widely used in construction, structural steelwork, fencing, agricultural installations and outdoor infrastructure where unprotected steel would quickly deteriorate.


At Duchy Fasteners, a comprehensive range of galvanised bolts is held in stock to support demanding trade and industrial applications. Customers can purchase directly from the trade counter or order online for fast UK-wide courier delivery, ensuring reliable access to galvanised fixings when durability matters most.

What Are Galvanised Bolts?

Galvanised bolts are carbon steel bolts that have been coated with zinc to protect them from corrosion. At Duchy Fasteners, galvanised bolts are hot dipped galvanised, meaning they are immersed in molten zinc to create a thick, durable protective coating.

This coating covers the entire bolt, including the threads, providing superior protection compared to thinner plated finishes. The zinc layer acts sacrificially, corroding in preference to the steel beneath and significantly extending the service life of the bolt in outdoor and exposed environments.

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Galvanised Bolts Held in Stock

Duchy Fasteners stocks a strong and practical range of galvanised bolts suitable for both general construction and heavy duty structural use.

The galvanised bolt range includes:


  • Hot dipped galvanised hex bolts

  • Galvanised set bolts for structural assemblies

  • Matching galvanised nuts

  • Galvanised washers for load distribution and surface protection

These bolts are available in common metric sizes to support fencing, steelwork, agricultural and infrastructure projects.

High Tensile Galvanised Bolt Grades

Strength is just as important as corrosion resistance in many applications. Duchy Fasteners stocks galvanised bolts in high tensile grades 8.8, 10.9 and 12.9, allowing customers to specify bolts based on load and structural requirements.


Grade 8.8 galvanised bolts are commonly used in general construction and structural assemblies.


Grade 10.9 galvanised bolts provide increased tensile strength for heavier engineering and machinery installations.


Grade 12.9 galvanised bolts offer the highest strength and are used where maximum load bearing performance is essential.


Combining high tensile steel with hot dip galvanising ensures bolts perform reliably in both mechanical and environmental terms.

Typical Uses for Galvanised Bolts

Galvanised bolts are commonly specified for outdoor and exposed applications where durability is critical.


Typical uses include fencing and gates, structural steelwork, agricultural buildings, outdoor frameworks, infrastructure projects and general construction. Their corrosion resistance makes them particularly suitable for rural and industrial environments where weather exposure is unavoidable.


Correct specification ensures galvanised bolts provide long service life with minimal maintenance.

Corrosion Resistance and Outdoor Performance

The thick zinc coating applied through hot dip galvanising provides excellent protection against rust and environmental wear. Galvanised bolts perform well in wet conditions, variable weather and general outdoor exposure.


While stainless steel may be preferred for coastal or marine environments, hot dipped galvanised bolts offer a robust and cost effective solution for most outdoor construction and infrastructure projects.

Strength and Reliability

High tensile galvanised bolts provide dependable strength for load bearing applications. When tightened correctly, they maintain clamping force and resist loosening under vibration and stress.


Selecting the correct bolt grade, size and washer combination is essential to ensure safety and long term performance, particularly in structural and heavy duty installations.

Trade Counter Supply in Cornwall

Customers can purchase galvanised bolts directly from the Duchy Fasteners trade counter at Cornwall Business Park. This allows customers to inspect bolts, confirm grades and sizes and collect fixings immediately.


The trade counter service is ideal for urgent site work, fencing projects and construction jobs where fast access to galvanised bolts is essential. Knowledgeable staff are available to assist with selecting suitable bolt grades where required.

Online Ordering and UK Delivery

Galvanised bolts are also available to order online with courier delivery across Cornwall and the rest of the UK. This supports customers managing projects remotely or working across multiple sites.


Online access to the same extensive galvanised bolt range ensures consistent availability for repeat orders and national projects.

Why Choose Duchy Fasteners for Galvanised Bolts

Duchy Fasteners specialises in fixings and fastenings, allowing for deeper stock and wider choice than general suppliers. By offering hot dipped galvanised bolts in high tensile grades 8.8, 10.9 and 12.9, customers can source corrosion resistant and high strength fixings from one trusted supplier.


Flexible purchasing options, reliable stock and practical trade knowledge make Duchy Fasteners a dependable choice for galvanised bolts in Cornwall and beyond.

FAQs About Galvanised Bolts

What does hot dipped galvanised mean?

It means the bolts are coated in molten zinc to provide thick, long lasting corrosion protection.

Are galvanised bolts suitable for outdoor use?

Yes, hot dipped galvanised bolts are designed specifically for outdoor and exposed environments.

What grades of galvanised bolts are available?

Duchy Fasteners stocks high tensile grades 8.8, 10.9 and 12.9.

Can I buy galvanised bolts locally in Cornwall?

Yes, galvanised bolts are available from the Duchy Fasteners trade counter in Scorrier.

Do you deliver galvanised bolts across the UK?

Yes, galvanised bolts can be ordered online and delivered nationwide.

How Does This Affect Your Project?

Choosing the correct galvanised bolts ensures long term corrosion resistance and dependable strength in demanding outdoor environments. By sourcing hot dipped galvanised bolts from Duchy Fasteners, customers benefit from specialist stock, accurate grades and flexible purchasing options.


Whether working on fencing, construction or structural projects, Duchy Fasteners provides galvanised bolts built to perform where reliability matters most.