Galvanised Cup Square Hexagon Bolts & Nuts - DIN648

Our Galvanised Cup Square Hex Bolts & Nuts are also sometimes known as coach bolts or carriage bolts. They are ideal for use in external timber connections as the square section under the mushroom head pulls into the timber enabling the bolt to be tightened without the head spinning. The mushroom or domed head gives a neat appearance.

These Cup Square hex bolts are produced to DIN603 out of 4.6 grade mild steel. They are usually either fully threaded or over 100mm long have approximately 100mm of thread – please note this can vary especially on a galvanised version so check with our sales office if you have a specific requirement.

The Galvanised Cup Square Hex Bolts are ideal for external applications or where the risk of corrosion is high. We also supply in a BZP finish for internal protected applications or some sizes in Stainless Steel for use in external or corrosive environments.

Galvanised Cup Square Hex bolts are often used in conjunction with repair washers, square plate washers and timber connectors which can be purchased separately.

• Grade 4.6 strength for dependable performance
• Galvanised finish for enhanced durability
• Cup square design prevents rotation during installation
• DIN 603 standard compliance guarantees quality
• Versatile applications in construction, woodworking, and more