The TIMCO Multi-Fix Bolts Hex Head Exterior Silver provides a stress-free, non-expansion through fixing solution for heavy duty anchoring into concrete, brick, stone, wood and concrete block. These innovative bolts replace traditional anchors such as throughbolts, shield, sleeve and drop-in anchors with their unique concave thread configuration and high-low parallel threads for ease of insertion and high pull-out values. Featuring TIMco micro plating (Nano) technology for superior corrosion resistance, these removable and adjustable fixings are all steel and non-flammable, conforming to BS 7671 standard’s 18th edition requirements for fire safety in wiring systems.