Self-tapping screw for sheet steel has metal plate mounted in slit at end of its shaft which has stepped end with cutting edges on tip and shoulder and thread cutters along its edge

• Main Author: WAKAI, TAKAO
• Format: Patent
• Language: English; German
• Published: 06.11.2003
• Edition: 7
• Subjects: BLASTING; 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; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

The self-tapping screw has a metal plate (9) mounted in a slit at the end of its shaft (3). This has a stepped end with cutting edges (10, 11) on the tip and shoulder. Thread cutters (13) are positioned along its edge. The reminder of the screw has a conventional thread (2). Es wird eine Bohrschraub...