Asbestos cement type facade panel self tapping screw - has enlarged cutting section below head, for making larger holes

There is a thin threadless shaft section below the screw head. The OD of the threaded section is increased in the area of the end facing the head. The self-drilling screw is used for fixing external wall-facing panels, such as those of asbestos cement, on a substructure. Below the screw head, spaced...

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Bibliographische Detailangaben
1. Verfasser:	KNOCHE,FRANK
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	BLASTING BUILDING DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ENGINEERING ELEMENTS AND UNITS FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	There is a thin threadless shaft section below the screw head. The OD of the threaded section is increased in the area of the end facing the head. The self-drilling screw is used for fixing external wall-facing panels, such as those of asbestos cement, on a substructure. Below the screw head, spaced according to facing panel thickness, there is a likewise self-tapping cutting section, of larger OD in relation to the screw thread. This can be formed by a sleeve socket set on the thread of the screw, with cutting edges on it. Stops for this can be pressed on the shaft, at intervals equal to the panel thickness.