Light sleeve anchor for push-through installation. When the hexagonal nut or bolt is tightened, the tapered screw is pulled into the expansion sleeve and expands it against the hole wall. Diff erent head shapes available: - stud with hexagon nut (FSL-B) - hexagon head screw (FSL-S) Diameters 6 to 20 mm. Zinc plated steel version for indoor use. Suitable for: Non-cracked con crete ≥ C12/15. Natural stone with dense structure. For fi xing of: Steel constructions.