ISO 7090:2000 pdf download – Plain washers, chamfered – Normal series -Product grade A
ISO 7090:2000 pdf download – Plain washers, chamfered – Normal series -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 cliamelers) ranging from 5 mm 1064 mm indusive,
Washers 01 hardness class 21)0 HV are suitable for
bolts and screws of product grades A and B in property classes t to and inchiding 8.8:
— nuts of product grades A and B In properly classes up to and Including 8:
— 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
bolts and screws 01 product grades A and B in property classes i to and including 10.9; nuts of product grades A and B in properly 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 wor)cpiece are used, the user should check the technical suitability of this type of washer.
2 Normative references
The following normative documents contain provisions whéch, 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 appty. However, parties to agreements based on this International Standard 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 EC maintain registers of currently valid International Standards,
ISO 887:2000. Plain washers for metric bolts, screws and nuts for general purposes — General plan. ISO 3269:2000, Fasteners — Acceptance inspection.
ISO 3506-1:1997. Mechanical properties of corrosion-resjstant stainless-steel fasteners — Part 1: Bolts. screws and studs.
ISO 4042:1999, Fasteners — Electroplated coatings.
ISO 4759-32000. Tolerances for fasteners — Part 3: Plain washers for bolts, screws and nuts — Product grades A and C.
ISO 6507-1:1997. Metallic materials — Vickers hardness test — Part 1: Test method. 15010683I), Fasteners — Non-eleclrotytically applied zinc flake coatings.
See Figure 1 and Tables 1 and 2.