BS 3409-1-1961 金属丝螺纹镶件承受孔攻螺纹(统一标准粗牙螺纹和统一标准细牙螺纹)规范.第1部分:孔径1/4英寸以上(含1/4英寸)

标准号：BS 3409-1-1961
中文标准名称：金属丝螺纹镶件承受孔攻螺纹(统一标准粗牙螺纹和统一标准细牙螺纹)规范.第1部分:孔径1/4英寸以上(含1/4英寸)
英文标准名称：Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads) - Diameters 1/4 in and over
标准类型：J04
发布日期：1961/8/16 12:00:00
实施日期：1961/8/16 12:00:00
中国标准分类号：J04
国际标准分类号：25.100.50
适用范围：Specifies limits of size for tapped holes to accommodate wire thread inserts to provide thread sizes from $9D in to 1$9H in UNC inclusive and from $9D in to 1 in UNF inclusive. It includes recommendations for general dimensions and limits of size on the threaded portion of screwing taps intended to produce holes to the limits specified, together with details of a recommended gauging system for checking them.