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  • BSI
    BS 7814:1995 Specification for bolts and screws incorporating either underhead locking or anti-rotation features
    Edition: 1995
    $266.02
    / user per year

Description of BS 7814:1995 1995

This British Standard specifies the materials, mechanical properties and marking requirements for bolts and screws incorporating either underhead locking or anti-rotation features when tested at an ambient temperature between 15 °C and 30 °C.

It applies to bolts and screws:

  1. with ISO metric M2 to M20 threads conforming to BS 3643-2:1981;
  2. with mechanical properties 80, 90 or 1001) as appropriate;
  3. for use within the temperature range – 50 °C to + 250 °C.

As the decarburization of any underhead locking or anti-rotation feature will seriously impair its intended function, partial or complete decarburization as given in BS EN 20898-1:1992 does not apply to this standard. There is instead a requirement for carbon restoration to ensure that no decarburization of the locking or anti-rotation feature takes place during the heat treatment process.

NOTE Performance at temperatures outside the operating range is not within the requirements of this standard.



Standard NumberBS 7814:1995
TitleSpecification for bolts and screws incorporating either underhead locking or anti-rotation features
StatusConfirmed
Publication Date1995-12-15
DescriptorsGrades (quality), External-thread fasteners, Vibration-resistant fasteners, Marking, Threaded fasteners, Steels, Decarburization, Embrittlement, Bolts, Hardness measurement, Hardness testing, Screws (bolts), Tensile strength, Vickers hardness measurement, Hardness, Decarburization tests
ICS21.060.10 Bolts, screws, studs
CommitteeFME/9
ISBN0 580 24520 9
PublisherBSI
Pages10

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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