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  • BSI
    BS 919-2:2007 Screw gauge limits and tolerances - Specification for gauges for screw threads of Whitworth and B.A. forms
    Edition: 2009
    $442.60
    / user per year

Description of BS 919-2:2007 2009

This Part of BS 919 specifies requirements for the following gauges intended for checking screw threads in the regular series, such as BS Whit., BS Fine, B.A., BSC and BS Conduit.

a) Screw gauges for general and reference use:

  1. solid (non-adjustable) screw plug gauges, GO and NOT GO;
  2. solid and adjustable GO screw ring gauges;
  3. adjustable thread calliper gauges, GO and NOT GO.

NOTE NOT GO effective diameter ring gauges are also included since they have certain limited applications. In principle, however, their use is not recommended.

b) Plain plug gauges and plain calliper gauges for the crests of threads.

NOTE Provision is made in the standard for both GO and NOT GO plain gauges, but GO plain gauges are normally required only in the case of threads where the corresponding GO screw gauges do not control the maximum metal condition at the crests of the threads of the product.

c) Setting plugs for adjustable screw ring and thread calliper gauges, GO and NOT GO.

This standard may be applied also to gauges for any screw threads of Whitworth form, but not to gauges for Acme, buttress or round threads.

Annex A provides guidance on the various types of gauges.

Information relating to the effective diameter equivalent of pitch and angle errors and to the thread form of NOT GO effective diameter gauges is given in Annex B, Annex C and Annex D.

No requirements are specified for the materials for gauges, but guidance on the hardness of gauges is given in Annex E.



Standard NumberBS 919-2:2007
TitleScrew gauge limits and tolerances - Specification for gauges for screw threads of Whitworth and B.A. forms
StatusConfirmed
Publication Date2009-09-30
ReplacesBS 919-2:1971
CorrectsBS 919-2:2007
DescriptorsPlug gauges, Ring gauges, British Association screw threads, Marking, Thread forms, Linear measuring instruments, Thread pitch, Dimensional tolerances, British standard cycle threads, Dimensions, Diameter measurement, Calipers (instruments), Thread gauges, Whitworth screw threads, Setting gauges, Hardness, Diameter
ICS21.040.20 Inch screw threads
CommitteeFME/9
ISBN978 0 580 68657 3
PublisherBSI
Pages42

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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