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For fastening single-ply membrane roof covering material when the fix-layer is sheet metal, concrete or wood
Should be fastened to the fix-layer with a roof screw, a concrete screw or a concrete nail

For fastening hard insulation sheets or bitumen roof covering and insulation sheets when the fix-layer is sheet metal, concrete or wood
Should be fastened to the fix-layer with a roof screw, a concrete screw or a concrete nail

For fastening Croco A and B 150-700 Fasteners to roofing or insulation material
Product has a Torx 25 (TX25) screw head

For fastening Croco A and B 110 Fasteners to a concrete fix-layer
Can also be used to fasten timber, sheet metal etc.
The length of the nail should be chosen according to the insulation thickness and the fastener, so that the installation depth is at least 20 mm

For fastening Croco A and B 110 Fasteners to a sheet metal or wooden fix-layer
No.1 screw should be used with sheet metal of maximum thickness 1.25 mm
The length of the screw should be chosen according to the insulation thickness and the length of the fastener, so that the screw pierces the steel to a depth of at least 15 mm

For fastening Croco A and B 110 Fasteners to a concrete fix-layer
Can also be used to fasten timber, sheet metal etc.
The length of the screw should be chosen according to the insulation thickness and the length of the fastener, so that the installation depth is at least 20 mm

For fastening Croco A and B 110 Fasteners to a sheet metal or wooden fix-layer
No.3 screw should be used with thicker materials
The length of the screw should be chosen according to the insulation thickness and the length of the fastener, so that the screw pierces the steel to a depth of at least 15 mm