TH71749B - Self tapping screw (tapping screw) - Google Patents

Abstract

DC60 (16/12/56) Disclosed herein is a self-tapping screw (1) with excellent unwinding force. For workpieces that work with soft materials such as resins and aluminum alloys. The self-tapping screw (1) consists of the shaft part (3) and the normal thread (10) made on the outer circumferential surface of the shaft part. normally out and the trussing part (30) is arranged at the bottom of the trench along the part or all of the edge of the bottom. extending from the flank surface of the normal spiral continuously The self-tapping screw (1) exerts its strength, excellent loosening even when the workpiece is stretched. Shrink or shake because the protrusions (30) are embedded in many places. The part of the workpiece that has been buried into the slit (20) is revealed here is a self-tapping screw (1) with excellent unwinding force. For workpieces that work with soft materials such as resins and aluminum alloys. The self-tapping screw (1) consists of the shaft part (3) and the normal thread (10) made on the outer circumferential surface of the shaft part. normally removed and the ribbed protrusions (30) are arranged at the bottom of the trench along part or all of the edge of the bottom. extending from the flank surface of the normal spiral continuously Self-tapping screw (1) Excellent release even when the workpiece is stretched Shrinks or vibrates because of the gripping part. (30) Buried in many places The part of the workpiece that has been buried in the trench (20)

Claims (3)

Disclaimer (all) which will not appear on the advertisement page. : ------ 08/08/2018 ------ (OCR) Page 1 of amount 1 page. 1.Screw, self-tapping, consists of a core part And normal threads made on the outer circumference of the axial portion The spaced grooves were made by cutting off the ridges of the normal thread. And the gripping protrusions are located at the bottom of the groove, spaced along a portion or all of the edge of the buttocks extending from the flank surface of a continuous normal thread And the said protrusion protruding from the bottom of the spaced groove 2. The self-tapping screw, according to claim 1, at the normal thread pitch, has a symmetrical shape, and the groove is arranged on the edge of the slit, continuously spaced from the lateral flank surface. Smaller than 3. The self-tapping screw, according to claim 1 or 2, the axial part has a cross-sectional shape made in such a way that a number of arc-shaped segments of different radiiations are connected. Separator ------------ 1. A self-tapping screw consisting of a shaft assembly. And the normal threads made on The outer circumference of the shaft section where the periodic groove is made by cutting off the normal thread ridges and the gripping protrusions are located at the bottom of the groove, along the part or all of the grooves. The edge of the buttocks protruding from Flank surface of a continuous normal spiral