BS 84-2007 惠氏螺纹牙样的平行螺纹.要求

标准号：BS 84-2007
中文标准名称：惠氏螺纹牙样的平行螺纹.要求
英文标准名称：Parallel screw threads of Whitworth form – Requirements
标准类型：J05
发布日期：2007/11/30 12:00:00
实施日期：2007/11/30 12:00:00
中国标准分类号：J05
国际标准分类号：21.040.20
引用标准：BS 919-2;BS 6528-1984
适用范围：This British Standard specifies limits of sizes, and tolerances, for singlestart parallel screw threads of Whitworth form, for general engineeringuse. It is not applicable to threads for threaded pipe joints, screwthreads associated with interference fits, such as those on the “metalends” of studs and in the corresponding tapped holes, or to screwthreads which are to be subjected to high temperatures.This standard specifies the following thread series:a) a coarse thread series, the British Standard Whitworth (B.S.W.)series, with nominal diameters in the range in to 6 in.b) a fine thread series, the British Standard fine (B.S.F.) series, withnominal diameters in the range in to 4 in.NOTE The tables of limits and tolerances for the B.S.F. series extendup to the 3 in size only, since nominal sizes above 3 in are rarely used.c) a supplementary selected thread (WHIT. S.) series with nominaldiameters from in to 7 in.d) a truncated Whitworth form series (specified in Annex A).This British Standard specifies limits of sizes, and tolerances, ofuncoated threads and also for metal coated threads (including threadscoated with nickel, tin or zinc) with a thickness of coating of the orderof 0.000 2 in. It is not applicable to heavily coated threads (i.e. threadswith a coating thickness above 0.000 35 in).NOTE Supplementary information is given in Annex B, Annex C andAnnex D.