CENTERING BOLT

PROBLEM TO BE SOLVED: To provide a bolt which surely and easily accomplish meshing of the first one thread ridge in fastening the bolt in a female screw. SOLUTION: The tip part of a bolt 1 includes a no-ridge straight part 4 having a diameter with a desired clearance from the diameter of a female sc...

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Bibliographische Detailangaben
1. Verfasser:	SANO KAZUYUKI
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:	PROBLEM TO BE SOLVED: To provide a bolt which surely and easily accomplish meshing of the first one thread ridge in fastening the bolt in a female screw. SOLUTION: The tip part of a bolt 1 includes a no-ridge straight part 4 having a diameter with a desired clearance from the diameter of a female screw screw-engaged with the bolt 1 and can be smoothly inserted in a female screw hole, and/or a taper part tapered from the valley diameter of a bolt screw part 3 toward the tip, wherein in inserting the bolt in the female screw hole, first the straight part 4 is moved along the female screw ridge so that with the center lines of a male screw and a female screw substantially aligned, the thread ridge starts to screw-engage.