Bolts

About Bolts

Bolts are threaded fasteners designed to pass through pre-drilled holes and secure components together using a matching nut, creating strong, reliable connections for construction, engineering, and DIY applications throughout the UK. Unlike screws that create their own thread, bolts provide superior clamping force and can be easily disassembled without damaging materials. MyToolShed.co.uk stocks a comprehensive range including hexagon bolts for general structural work, coach bolts for heavy timber connections, socket cap screws for precision engineering, and specialised roofing bolts for metal sheeting installations.

Available in various materials and finishes—from zinc-plated steel for indoor use to stainless steel and galvanised options for outdoor and corrosive environments—our bolt selection meets British and European standards for strength and durability. Whether you need assorted bolt packs for workshop stock or specific sizes for large-scale projects, MyToolShed.co.uk provides quality fastening solutions for professional tradespeople and DIY enthusiasts alike.

Applications

• Structural engineers and steelworkers: Assembling frameworks and connecting beams with high-tensile bolts
• Joiners and carpenters: Heavy timber constructions, decking, and fence installations using coach bolts
• Roofing contractors: Securing metal roofing sheets, cladding, and gutter systems
• Mechanical engineers: Assembling machinery and precision equipment with socket cap screws
• Maintenance engineers: General repairs across industrial and commercial facilities
• Agricultural mechanics: Repairing farm machinery in demanding outdoor environments
• Automotive technicians: Vehicle repairs, modifications, and chassis work
• Shopfitters: Securing fixtures, shelving, and commercial installations
• DIY enthusiasts: Home repairs, furniture assembly, and general maintenance

Choosing The Right Bolts

Material and finish: Standard zinc-plated steel suits indoor applications, whilst galvanised or stainless steel options resist corrosion outdoors. Marine environments require A4 marine-grade stainless steel.

Bolt type: Hexagon bolts offer versatile general-purpose fastening with tool access from above. Coach bolts feature domed heads that prevent rotation in timber. Socket cap screws provide low-profile heads for machinery with limited clearance.

Size selection: Choose diameter based on load requirements—structural work typically uses M10, M12, or larger, whilst lighter duties need M6 or M8. Length should allow 2-3 threads to protrude beyond the nut when tightened.

Grade and strength: Property class markings indicate tensile strength—Grade 4.6 suits light duties, 8.8 is standard for most structural work, whilst 10.9 and 12.9 provide high strength for critical applications.

Frequently Asked Questions

What's the difference between a bolt and a screw?

Bolts pass through pre-drilled holes and secure with a nut, creating strong clamping force. Screws create their own thread when driven into materials. Bolts generally provide stronger, more reliable connections for load-bearing applications and allow easy disassembly.

What does M8 x 1.25 x 50mm mean?

This metric specification indicates an 8mm diameter thread (M8), 1.25mm thread pitch (distance between threads), and 50mm length measured from under the head to the bolt end. The pitch is often omitted when it's the standard coarse pitch for that diameter.

Do I need to use washers with bolts?

Washers aren't always mandatory but are highly recommended. They distribute load over a larger area, protect material surfaces during tightening, and prevent nuts pulling through softer materials. Spring washers or nyloc nuts should be used in applications subject to vibration to prevent loosening.