BS 3409-2-1966 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2部分:孔径小于1/4英寸

标准号：BS 3409-2-1966
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2部分:孔径小于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 below 1/4 in
标准类型：J04
发布日期：1966/1/31 12:00:00
实施日期：1966/1/31 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：Limits of size for tapped holes to accommodate wire thread inserts to provide thread sizes from No. 2 to No. 12 UNC inclusive and from No. 2 to No. 12 UNF inclusive. Recommendations for general dimensions and limits of size on the threaded portion of screwing taps intended to produce holes to the limits specified; details of a recommended gauging system for checking them.