Screw & wall plug kit Fischer 520182 2 pcs Plastic for Concrete

The fischer stand-off insulation system TherMax 8 provides a thermal-bridge-free solution for fastening into external walls within ETICS. The stud screw with a glass-fibre-reinforced cone penetrates the plaster and sits in the insulation, while the anti-cold cone at the tip creates a thermal barrier and secures the outer fixing. TherMax is intended for light loads such as lights, letterboxes or lightning conductors and can be used with concrete, autoclaved aerated concrete (AAC) and masonry made from solid or perforated brick. The kit Fischer 520182 contains two UX 12 x 70 universal anchors, two SX 5 x 25 screws, two TherMax stud screws and two cover caps suitable for these applications.

Advantages

The stand-off design allows the fixture to be positioned at the required distance from the insulated façade, preventing pressure marks and damage to the ETICS. The glass-fibre-reinforced plastic cone cuts into the insulation with a positive fit, enabling fast installation without special tools. The plastic anti-cold cone forms a thermal barrier between the outer and inner parts of the fixing, delivering an energy-optimised fastening. When combined with the UX universal plug the system achieves secure anchoring in substrates such as concrete and AAC; without the UX plug direct mounting in wood substrate is possible after pre-drilling.

Suitable for

• Mounting light fixtures, letterboxes and lightning conductors on external insulated façades (ETICS)
• Use on concrete and autoclaved aerated concrete (AAC)
• Use on masonry from solid and perforated brick
• Applications where thermal-bridge-free fixing is required

Key specifications

• Package contents: 2 UX 12 x 70 anchors, 2 SX 5 x 25 screws, 2 TherMax stud screws, 2 cover caps
• Manufacturer: FISCHER, MPN: 520182, EAN: 4048962166842
• Suitable substrates: concrete, autoclaved aerated concrete (AAC), solid and perforated brick
• Intended loads: light loads (e.g., lights, letterboxes, lightning conductors)
• Drill hole diameter (recommended): 12 mm; minimum drill depth: 28 mm (as per product data)

How to use

Drill a hole through the ETICS and insulation to the required depth using the recommended diameter. Insert the UX universal plug into the substrate, then rotate the TherMax stud screw with its glass-fibre-reinforced cone through the plaster and into the insulation until the anti-cold cone engages and the outer fixing is held. Fasten the outer fixture using the supplied SX screws and cover with the provided caps. For direct mounting in timber substrates, pre-drill the hole and use the TherMax stud screw without the UX plug.

Usage recommendations

Use the TherMax system only for light loads as specified and follow the substrate-specific drilling depth and diameter. Combine TherMax with the UX plug for secure anchoring in masonry, concrete and AAC; for timber substrates, pre-drill and mount without the UX. Do not exceed the load limits for ETICS-fastening and follow local building regulations.