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  • BSI
    BS EN 26157-3:1992, ISO 6157-3:1988 Fasteners. Surface discontinuities. - Bolts, screws and studs for special requirements
    Edition: 1992
    $316.70
    / user per year

Description of BS EN 26157-3:1992 1992

1.1 This part of ISO 6157 establishes limits for various types of surface discontinuities on bolts, screws and studs for special requirements.

It applies to bolts, screws and studs with

  • nominal thread diameters 5 mm and larger;

  • product grades A and B;

  • nominal lenghts l ≤ 10d (or longer if specified);

  • property class 12.9;

  • property classes 8.8, 9.8 and 10.9 when specified in product standards or agreed between supplier and purchaser.

1.2 Where the permissible limits for surface discontinuities indicated in clause 3 occur, the minimum values for the mechanical and functional properties specified in ISO 898-1 should still be met.

When fatigue strength requirements are specified, the fatigue strength should not be lower than that obtained on bolts without defects taken from the same lot.

NOTE 1 The figures in clause 3 are examples only. They apply correspondingly also to other types of bolts, screws and studs.

NOTE 2 The individual figures show the surface discontinuities exaggerated in some cases for clarity.



Standard NumberBS EN 26157-3:1992, ISO 6157-3:1988
TitleFasteners. Surface discontinuities. - Bolts, screws and studs for special requirements
StatusDefinitive
Publication Date1992-04-01
Identical National Standard OfISO 6157-3:1988, EN 26157-3:1991
DescriptorsHexagonal-head fasteners, Round-head fasteners, Surface defects, Threaded components, Surface properties, Socket-head fasteners, Fasteners, Studs (fasteners), Non-destructive testing, Fracture, Cracking, Destructive testing, Bolts, Threads, Screws (bolts), Defects
ICS21.060.10 Bolts, screws, studs
CommitteeFME/9
ISBN0 580 20685 8
PublisherBSI
Pages22

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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