Our A4 Stainless Steel (316) Cup Square Hex Bolts are also sometimes known as coach bolts or carriage bolts. They are ideal for use in 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 DIN603/555 out of A4 Stainless Steel (316) so are especially suited to marine and salt water applications or highly corrosive environments for external applications. They are usually either fully threaded or over 100mm long have approximately 100mm of thread. We also supply some sizes in BZP Steel, Galvanised steel or A2 Stainless Steel.

The bolts are NOT normally supplied with hexagon nuts as standard so please order these separately. They are often used in conjunction with repair washers, square plate washers and timber connectors which can be purchased separately.