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  • BSI
    BS 3643-2:2007 ISO metric screw threads - Specification for selected limits of size
    Edition: 2014
    $500.66
    / user per year

Description of BS 3643-2:2007 2014

This part of this BS 3643 specifies the fundamental deviations, tolerances and limits of size for the tolerance classes 4H, 5H, 6H and 7H for internal threads and 4h, 6g and 8g for external threads where appropriate for:

  • a coarse pitch series with the range 1 mm to 68 mm diameter;

  • a fine pitch series with the range 1 mm to 33 mm diameter;

  • a constant pitch series with the range 8 mm to 300 mm diameter.

For certain diameter/pitch combinations, the fundamental deviations, tolerances and limits of size for tolerance class 4H for internal threads and tolerance classes 6h and 4g for external threads, primarily for aerospace use, are specified in Annex A.



Standard NumberBS 3643-2:2007
TitleISO metric screw threads - Specification for selected limits of size
StatusConfirmed
Publication Date2014-06-30
ReplacesBS 3643-2:1981
CorrectsBS 3643-2:2007
DescriptorsISO metric threads, Dimensions, Bolts, Diameter, Nuts, Thread forms, Size, Thread pitch, Threads, Dimensional tolerances, Aircraft components
ICS21.040.10 Metric screw threads
CommitteeFME/9
ISBN978 0 580 86558 9
PublisherBSI
Pages48

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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