ISO 7090:2000 pdf free

ISO 7090:2000 pdf free.Plain washers, chamfered – Normal series一Product grade A
ISO 7090 specifies the characteristics of normal-series， product-grade-A plain washers chamfered at the outside diameter, in the 200 HV and 300 HV hardness classes and of nominal sizes (nominal thread diameters) ranging from 5 mm to 64 mm inclusive.
Washers of hardness class 200 HV are suitable for
一bolts and screws of product grades A and B in property classes up to and including 8.8;
一nuts of product grades A and B in property classes up to and including 8;
一bolts, screws and nuts of stainless steel of similar chemical composition;
一case-hardened thread rlling screws.
Washers of hardness class 300 HV are suitable for
一bolts and screws of product grades A and B in property classes up to and including 10.9;
一nuts of product grades A and B 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 ISO 887.
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.
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on ISO 7090 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 887:2000, Plain washers for metric bolts, screws and nuts for general purposes一General plan.
ISO 3269:2000, Fasteners一Acceptance inspection.
ISO 3506-1:1997, Mechanical properties of corrosion-resistant stainless-steel fasteners 一Part 1: Bolts, screws and studs.
ISO 4042:1999, Fasteners一Electroplated coatings.
ISO 4759-3:2000, Tolerances for fasteners一Part 3: Plain washers for bolts, screws and nuts一Product grades A
ISO 6507-1:1997, Metllic materials一Vickers hardness test一Part 1: Test method.
ISO 10683- 1), Fasteners一Non electrolytically applied zinc flake coatings.ISO 7090 pdf download.