TAPPING SCREW

PROBLEM TO BE SOLVED: To provide a stainless tapping screw capable of attaining self-tapping fastening for an opposite material having higher rigidity than a raw material constituting the tapping screw.SOLUTION: A tapping screw includes: a screw body having a core part comprising stainless material...

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Bibliographische Detailangaben
Hauptverfasser:	UENO YOSHIMITSU, OTSUKI KIYOTO, MIYATA TAKUMI
Format:	Patent
Sprache:	eng ; jpn
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 stainless tapping screw capable of attaining self-tapping fastening for an opposite material having higher rigidity than a raw material constituting the tapping screw.SOLUTION: A tapping screw includes: a screw body having a core part comprising stainless material and a hardening layer configured to perform surface hardening to the core part; and a zinc nickel alloy plating covering the surface of the hardening layer. In the tapping screw, nano-indentation hardness of the zinc nickel alloy plating is within a range of 5000-7000 N/mm.SELECTED DRAWING: Figure 3 【課題】ステンレス製のタッピンねじにおいて当該タッピンねじを構成する素材よりも硬度が高い相手材に対してもセルフタップ締結を実現する。【解決手段】本発明に係るタッピンねじは、ステンレス素材からなる心部及びこの心部に表面硬化処理を行った硬化層を有するねじ本体と、前記硬化層の表面を被覆する亜鉛ニッケル合金めっきとを具備することを特徴とするタッピンねじである。また本発明に係るタッピンねじは、亜鉛ニッケル合金めっきの硬度がナノインデンテーション硬さ５０００〜７０００Ｎ／ｍｍ２である。【選択図】図３