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BSI BS EN 26157-3:1992

Fasteners. Surface discontinuities. -- Bolts, screws and studs for special requirements
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BSI BS EN 26157-3:1992

Fasteners. Surface discontinuities. -- Bolts, screws and studs for special requirements

PUBLISH DATE 1992
PAGES 24
BSI BS EN 26157-3:1992

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.

SDO BSI: British Standards Institution
Document Number EN 26157-3
Publication Date April 1, 1992
Language en - English
Page Count 24
Revision Level
Supercedes
Committee FME/9
Publish Date Document Id Type View
April 1, 1992 BS EN 26157-3:1992 Revision