Double-thread bolt device

The utility model relates to a double threaded bolt device and includes a screw, a thread, a head and a tail of the threaded bolt, the thread is double-line, and the inside section is trapezoid, and the thread is made by a special thread rolling, the double-line thread turns of the screw are 3-9 cir...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	JIANGUO DOU
Format:	Patent
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	The utility model relates to a double threaded bolt device and includes a screw, a thread, a head and a tail of the threaded bolt, the thread is double-line, and the inside section is trapezoid, and the thread is made by a special thread rolling, the double-line thread turns of the screw are 3-9 circles, the tail is tapered, the threaded bolt is characterized by higher penetration rate, higher adsorption force and pulling power, easier technology, low cost and easy mass production.