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BS EN ISO 7089:2000

Current

Current

The latest, up-to-date edition.

Plain washers. Normal series. Product grade A

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

15-09-2000

€156.59
Excluding VAT

Characteristics of normal-series, product-grade-A plain washers in the 200 HV and 300 HV hardness classes and of nominal sizes (nominal thread diameters) ranging from 1,6 mm to 64 mm inc. are defined. Washers of hardness class 200 HV are suitable for: hexagon bolts and screws of product grades A and B in property classes up to and including 8.8; hexagon nuts of product grades A and B in property classes up to and including 8; hexagon bolts, screws and nuts of stainless steel of similar chemical composition; case-hardened thread rolling screws, washers of hardness class 300 HV are suitable for hexagon bolts and screws of product grades A and B in property classes up to and including 10.9; hexagon nuts of product grades A and B in property classes up to and including 10.

Committee
FME/9
DevelopmentNote
Supersedes 97/706017 DC. (05/2005) Reviewed and confirmed by BSI, September 2006. (09/2006)
DocumentType
Standard
Pages
16
PublisherName
British Standards Institution
Status
Current
Supersedes

This International Standard specifies the characteristics of normal-series, product-grade-A plain washers in the 200 HV and 300 HV hardness classes and of nominal sizes (nominal thread diameters) ranging from 1,6mm to 64mm inclusive.

Washers of hardness class 200 HV are suitable for

  • hexagon bolts and screws of product grades A and В in property classes up to and including 8.8;

  • hexagon nuts of product grades A and В in property classes up to and including 8;

  • hexagon bolts, screws and nuts of stainless steel of similar chemical composition;

  • case-hardened thread rolling screws.

Washers of hardness class 300 HV are suitable for

  • hexagon bolts and screws of product grades A and В in property classes up to and including 10.9;

  • hexagon nuts of product grades A and В in property classes up to and including 10.

If dimensions other than those listed in this International Standard are required, they should be selected from those given in ISO887.

When soft material pieces are clamped, or large clearance holes in the workpiece are used, the user should check the technical suitability of this type of washer.

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ISO 4042:1999 Fasteners Electroplated coatings
ISO 3506-1:2009 Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws and studs
EN ISO 4042:1999 Fasteners - Electroplated coatings (ISO 4042:1999)
EN ISO 3506-1:2009 Mechanical properties of corrosion-resistant stainless steel fasteners - Part 1: Bolts, screws and studs (ISO 3506-1:2009)
EN ISO 4759-3:2016 Tolerances for fasteners - Part 3: Washers for bolts, screws and nuts - Product grades A, C and F (ISO 4759-3:2016)
ISO 887:2000 Plain washers for metric bolts, screws and nuts for general purposes General plan
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