Forgefix Hex Flange Head Lightning Bolts provide a virtually stress-free fixing for close to edge applications. They are self-threading & allow quick & easy installation of most masonry fixing applications. They can simply be screwed into a pre-drilled hole, without the need for a sleeve or plug. The bolts are through-fixing, eliminating the need for marking & re-positioning. They have a high load capacity due to the thread interlocking into the base material. The flange head acts as a fixed washer, distributing the load under the bolt head. The bolts have an Elementech coating for superior anti-corrosion, which has been salt spray tested to 1, 000 hours. Applications: Suitable for most masonry substrates including concrete & brickwork but also for hollow blocks or bricks due to the nature of the thread type anchoring along the total length of the fixing.