High tensile bolts

High tensile bolts are widely used in modern structural work where high strength and reliability are needed. Commonly used for timber connections, steel lintels and securing heavy parts like RSJs or wall plates, these bolts are engineered to withstand high stress. Builders choose high tensile bolts over standard fasteners when working on heavy-load joints or dynamic structures that must handle vibration and force over time.

This category includes a range of sizes, thread types, and finishes suited for interior or exterior use. You’ll find metric and imperial sizes, often graded for tensile strength (such as 8.8, 10.9, or 12.9). These grades indicate how much force the bolt can resist before breaking. Unlike mild steel bolts, high tensile bolt options are made from alloy steel and are usually heat-treated. Coatings vary to match environmental exposure—zinc-plated for dry conditions or galvanised for outdoor use.

Check Buildbuddy for the best prices on high tensile bolts.