M12 x 100MM Cup Square Bolt ( 1 Piece )

M12 x 100 Cup Square Bolt by Owlett Jaton (Hexstone Limited) is a Grade 4.8 steel coach bolt conforming to DIN 603, designed for reliable timber and structural connections. Also known as a carriage bolt or coach bolt, it features a domed round head and a square neck that bites into the substrate, preventing rotation during tightening — making it the go-to fastener for joiners, builders, and groundworkers across the UK.

Key Features and Specifications

• Diameter: M12 (12 mm)
• Length: 100 mm (fully threaded to DIN 603 standard)
• Thread pitch: 1.75 mm
• Head diameter (dk): 30.65 mm
• Head height (k): 6.95 mm
• Shoulder height (f): 8.75 mm
• Spanner size: 19 mm (for nut)
• Grade: 4.8 carbon steel
• Standard: DIN 603
• Finish: BZP (bright zinc plated) or hot-dip galvanised — corrosion-resistant for interior and exterior use
• Quantity: 1 piece (single bolt — nut not included unless stated)
• Brand: Owlett Jaton (Hexstone Limited)

Applications

• Timber-to-timber connections in fencing, decking, and pergola construction
• Metal bracket to timber fixing in structural joinery and carpentry
• Agricultural and equestrian fencing — gate posts and panel fixing
• Playground equipment, garden structures, and outdoor furniture assembly
• General construction and groundworks where a tamper-resistant, anti-spin fixing is required

Why Choose This Product

Owlett Jaton is the UK and Ireland’s leading wholesale supplier of fasteners and fixings, stocking over 30,000 product lines. The M12 x 100 Cup Square Bolt conforms to DIN 603, ensuring consistent dimensional accuracy and reliable performance on site. The anti-rotation square neck eliminates the need for two-handed access during tightening, saving time on awkward or one-sided fixings. The domed head profile is inherently tamper-resistant — a practical advantage for outdoor and public-facing installations. Sold as a single piece, it suits both small repair jobs and bulk trade orders alike.

Delivery in and Around London

We deliver the M12 x 100 Cup Square Bolt swiftly to customers across London, including inner boroughs such as Croydon, Lewisham, Southwark, Camden, and Hackney, as well as Greater London areas including Enfield, Bexley, Redbridge, and Barnet. We also supply to the surrounding counties of Kent, Essex, Surrey, and Hertfordshire. Trade quantities are welcome — whether you need a handful for a repair or a bulk order for a large construction project, we can accommodate your requirements.