DRK is a mechanical fastening designed for the installation of materials
insulating or waterproofing materials on flat deck-type roofs.
The DRK system is composed of a double thread screw and ribbed distribution washer.
The drilling capacity of the screw on trapezoidal steel sheet is 2.0mm.
Reduced drill tip, 8mm hexagonal head. . Anti-corrosion treatment with organic coating (15 Cycles.)
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