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  • BSI
    BS 84:2007 Parallel screw threads of Whitworth form. Requirements
    Edition: 2007
    $497.46
    / user per year

Description of BS 84:2007 2007

This British Standard specifies limits of sizes, and tolerances, for single start parallel screw threads of Whitworth form, for general engineering use. It is not applicable to threads for threaded pipe joints, screw threads associated with interference fits, such as those on the “metal ends” of studs and in the corresponding tapped holes, or to screw threads which are to be subjected to high temperatures.

This standard specifies the following thread series:

  1. a coarse thread series, the British Standard Whitworth (B.S.W.) series, with nominal diameters in the range image in to 6 in.

  2. a fine thread series, the British Standard fine (B.S.F.) series, with nominal diameters in the range image in to image in.

    NOTE The tables of limits and tolerances for the B.S.F. series extend up to the 3 in size only, since nominal sizes above 3 in are rarely used.

  3. a supplementary selected thread (WHIT. S.) series with nominal diameters from image in to 7 in.

  4. a truncated Whitworth form series (specified in Annex A).

This British Standard specifies limits of sizes, and tolerances, of uncoated threads and also for metal coated threads (including threads coated with nickel, tin or zinc) with a thickness of coating of the order of 0.000 2 in. It is not applicable to heavily coated threads (i.e. threads with a coating thickness above 0.000 35 in).

NOTE Supplementary information is given in Annex B, Annex C and Annex D.



Standard NumberBS 84:2007
TitleParallel screw threads of Whitworth form. Requirements
StatusConfirmed
Publication Date2007-11-30
ReplacesBS 84:1956
DescriptorsClose-fit threads, Normal threads, Nuts, Threads, Parallel threads, Thread pitch, Designations, Fits, Metal coatings, Thread forms, Whitworth screw threads, Diameter, Bolts, Medium threads, Free threads, Dimensions, Dimensional tolerances
ICS21.040.20 Inch screw threads
CommitteeFME/9
ISBN978 0 580 57923 3
PublisherBSI
Pages66

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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