BS 93:2008 - British Association (B.A.) screw threads. Requirements – BSI British Standards

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BS 93:2008

British Association (B.A.) screw threads. Requirements

Status : Confirmed, Current   Published : September 2008

Format
PDF

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HARDCOPY



BS 93:2008 British Association (B.A.) screw threads. Requirements

BS 93:2008 specifies limits of sizes, and tolerances, for single start parallel screw threads of British Association (B.A.) form. The standard specifies the British Association (B.A.) system of screw threads, which comprises 17 graded metric sizes designated by the numbers 0 to 16. Approximate inch equivalents are also given.

BS 93 specifies the following:

  • basic sizes for B.A. threads, sizes 0 B.A. to 16 B.A.
  • limits of size, and tolerances, for close class and normal class external threads of sizes 0 B.A. to 10 B.A.
  • limits of size, and tolerances, for normal class external threads of sizes 11 B.A. to 16 B.A.
  • limits of size, and tolerances, for a single class of internal threads of sizes 0 B.A. to 16 B.A.

It is not applicable to screw threads associated with interference fits, such as those on the “metal ends” of studs and in the corresponding tapped holes.

BS 93 is intended for use with BS 919-2:2007, which specifies the corresponding screw gauges.

This British Standard has been fully revised to bring it up to date. BS 93:2008 supersedes BS 93:1951, which is withdrawn.


As industries globalize,  it is important that manufacturers produce screws that are able to be used universally and across all sectors - Read more at Engineering Specifier




Standard NumberBS 93:2008
TitleBritish Association (B.A.) screw threads. Requirements
StatusConfirmed, Current
Publication Date30 September 2008
Confirm Date01 May 2018
Cross ReferencesBS 919-2, BS 6528:1984, PD 6494
ReplacesBS 93:1951
Draft Superseded By08/30173466 DC
DescriptorsDimensional tolerances, Normal threads, Bolts, Designations, Nuts, Threaded fasteners, Dimensions, Metal coatings, Thread pitch, Thread forms, Diameter, British Association screw threads, Close-fit threads, Threads, Parallel threads, Fits
ICS21.040.30
CommitteeFME/9
ISBN978 0 580 60893 3
PublisherBSI
FormatA4
DeliveryYes
Pages26
File Size291 KB
Price£176.00


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