Timco MF8100 Multi-Fix Masonry Bolts - Hex - Exterior - Silver 8.0 X 100 Box 50

Designed to replace traditional expansion anchors TIMCO micro plating technology gives a higher resistance to corrosion and enhances speed of installation High-Low parallel threads for ease of insertion and high pull-out values Removable & adjustable non-expansion through fixing Unique concave thread configuration All steel, non-flammable fixing conforming to BS 7671 standard's 18th edition, which requires wiring systems to be supported by materials which are unlikely to prematurely collapse in the event of a fire.