Machine Screws

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Machine screws are precision fasteners designed for use in pre-tapped holes or with matching nuts. They are widely used in engineering, manufacturing, electrical work and mechanical assemblies where accuracy, consistency and secure fastening are essential.

At Duchy Fasteners, a comprehensive range of machine screws is held in stock to support trade professionals and private customers across Cornwall and the wider UK. Customers can collect directly from the trade counter or order online for reliable courier delivery, ensuring fast access to precision fasteners when required.

What Are Machine Screws?

Machine screws are threaded fasteners with uniform diameter and precise thread profiles. Unlike wood screws or self-tapping screws, machine screws are designed to be used with pre-formed internal threads or paired with nuts.


This makes them ideal for applications where components may need to be assembled and disassembled repeatedly without damaging threads. Machine screws provide consistent clamping force and reliable alignment, which is essential in mechanical and electrical assemblies.


They are commonly used in metal to metal connections but are also suitable for use with plastics and other materials when specified correctly.

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Stainless Steel Fastenings A4 316
Stainless Steel Fastenings A4 316
Steel Self Colour
Steel Self Colour Fastenings
Galvanised Fastenings Duchy Fasteners
Galvanised Fastenings
Zinc Plated Fastenings
Zinc Plated Fastenings
Brass Fastenings Duchy Fasteners
Brass Fastenings

Machine Screws Held in Stock

Duchy Fasteners stocks a practical and trade-focused range of machine screws suitable for a wide variety of applications.

The range includes:


  • Metric machine screws in common diameters

  • Various screw lengths to suit different assembly depths

  • Multiple head styles to suit access and appearance requirements

  • Matching nuts and washers for complete assemblies

This selection allows customers to source compatible components from one supplier, reducing delays and simplifying procurement.

Materials and Finishes Available

Machine screws are often used in environments where corrosion resistance or clean appearance is important. Duchy Fasteners stocks machine screws in materials and finishes suitable for both internal and external use.


Options include corrosion resistant stainless steel for damp or exposed environments, zinc plated machine screws for clean internal installations and steel self colour options for controlled conditions.


This range ensures machine screws can be specified based on environment, performance and project requirements.

Typical Uses for Machine Screws

Machine screws are used across a wide range of industries and applications due to their precision and versatility.


Common uses include machinery assembly, electrical enclosures, control panels, automotive components, appliances, fabrication work and workshop builds. They are also widely used in maintenance and repair tasks where components need to be removed and refitted accurately.


Their consistent thread form makes machine screws particularly suitable for precision assemblies.

Strength and Performance Benefits

Machine screws provide strong and reliable fastening when used with correctly matched threads. They maintain consistent clamping force and help ensure accurate alignment of components.


Selecting the correct diameter, length and material is essential to ensure performance and prevent thread damage. When specified correctly, machine screws deliver long-term reliability in both static and dynamic applications.

Trade Counter Supply in Cornwall

Customers can purchase machine screws directly from the Duchy Fasteners trade counter at Cornwall Business Park. This allows trade professionals to inspect screws, confirm sizes and collect fasteners immediately.


The trade counter service is ideal for urgent repairs, workshop use and engineering projects where correct specification is critical. Knowledgeable staff are available to assist with selecting suitable machine screws where required.

Online Ordering and UK Delivery

Machine screws are also available to order online with courier delivery across Cornwall and the rest of the UK. This supports customers managing projects remotely or sourcing fasteners for multiple sites.


Online access to the same extensive machine screw range ensures consistent availability for repeat orders and national supply needs.

Why Choose Duchy Fasteners for Machine Screws

Duchy Fasteners specialises in fixings and fastenings rather than general building supplies. This focus allows the business to hold deeper stock of precision fasteners such as machine screws.


Customers choose Duchy Fasteners for reliable availability, multiple material options and flexible purchasing through local collection or online delivery. This makes it a dependable supplier for machine screws used in demanding applications.

FAQs About Machine Screws

What are machine screws used for?

They are used in pre-tapped holes or with nuts for precision mechanical and electrical assemblies.

Are machine screws different from self-tapping screws?

Yes, machine screws require pre-formed threads and do not cut their own threads.

Do you stock machine screws in different materials?

Yes, machine screws are available in stainless steel, zinc plated and steel self colour options.

Can I buy machine screws locally in Cornwall?

Yes, machine screws are available from the Duchy Fasteners trade counter in Scorrier.

Do you deliver machine screws across the UK?

Yes, machine screws can be ordered online and delivered nationwide.

How Does This Affect Your Project?

Choosing the correct machine screws ensures accuracy, reliability and ease of maintenance in precision assemblies. By sourcing machine screws from Duchy Fasteners, customers gain access to specialist stock, correct specification and dependable supply.


Whether working on engineering, electrical or maintenance projects, Duchy Fasteners provides machine screws designed to deliver consistent fastening where precision matters most.