BS EN ISO 10666-1999 自钻自攻螺钉.机械和功能特性

标准号：BS EN ISO 10666-1999
中文标准名称：自钻自攻螺钉.机械和功能特性
英文标准名称：Drilling screws with tapping screw threads - Mechanical and functional properties
标准类型：J13
发布日期：1999/11/15 12:00:00
实施日期：1999/11/15 12:00:00
中国标准分类号：J13
国际标准分类号：21.060.10
适用范围：This International Standard specifies the properties of heat treated screws with a tapping screw thread in accordance with ISO 1478, and which are designed with a drilling point which automatically drills the core hole for the screw during assembly. Such screws then automatically form the mating screw thread, either in a non-cutting or in a cutting operation, with the aid of the threaded portion of the screw adjoining the drilling point. The purpose of this International Standard is to ensure that the screws are able to drill their core hole and form their mating screw thread without becoming distorted or fracturing in the process, provided that no overstressing has occurred. Consequently the following characteristics are regarded as representing the most important aspects for the assessment of the mechanical and operational characteristics of a drilling screw: — surface hardness; — capability of core hole drilling and forming of the mating female screw thread; — torsional strength.