ISO 7090-2000 PDF
Name in English:
St ISO 7090-2000
Name in Russian:
Ст ISO 7090-2000
Original standard ISO 7090-2000 in PDF full version. Additional info + preview on request
Full title and description
St ISO 7090-2000 — Plain washers, chamfered — Normal series — Product grade A. This International Standard specifies dimensional and technical requirements for chamfered plain (flat) washers of the normal series in product grade A, intended for use with metric fasteners.
Abstract
ISO 7090:2000 defines the nominal sizes, tolerances, chamfer geometry, thicknesses and technical delivery conditions for chamfered plain washers (normal series, product grade A). The standard provides requirements intended to ensure interchangeability and consistent mechanical performance when used with bolts and screws; it is short (technical specification) and primarily focused on dimensional and surface characteristics.
General information
- Status: Published (International Standard).
- Publication date: June 2000 (Edition 2, 2000-06).
- Publisher: International Organization for Standardization (ISO).
- ICS / categories: 21.060.30 (Washers, locking elements).
- Edition / version: Edition 2 (2000).
- Number of pages: 5 pages (concise technical standard).
Scope
Specifies dimensions, tolerances and technical delivery conditions for chamfered plain washers of the normal series in product grade A, covering nominal thread diameters typically from M5 up to M64. Hardness classes and surface-roughness guidance are included to support correct use with bolts and screws; the standard is intended for manufacturers, suppliers and users of metric fasteners.
Key topics and requirements
- Dimensional table of nominal sizes (inner/outer diameters and thickness) for chamfered plain washers.
- Tolerance ranges for hole diameter, outer diameter and thickness to ensure interchangeability.
- Chamfer geometry on the outer diameter (specified form and limits).
- Specified product grade A requirements (higher quality/precision for normal series washers).
- Technical delivery conditions including hardness classes (examples: 200 HV and 300 HV referenced in national implementations) and surface-roughness guidance.
Typical use and users
Used by washer and fastener manufacturers, quality and inspection engineers, procurement specialists, mechanical designers and maintenance departments that require standardized, interchangeable chamfered washers for bolted assemblies in general engineering, machinery and structural applications.
Related standards
Closely related to ISO 7089:2000 (Plain washers — Normal series — Product grade A) and ISO 7091:2000 (Plain washers — Normal series — Product grade C); other regional adoptions (EN, BS, DIN, ÖNORM) align with ISO 7090:2000. The ISO technical committee work (ISO/TC 2) lists associated revisions and committee drafts for related washer standards.
Keywords
plain washer, chamfered washer, normal series, product grade A, ISO 7090, fasteners, dimensions, tolerances, hardness, surface roughness, ISO/TC 2.
FAQ
Q: What is this standard?
A: ISO 7090:2000 is an International Standard specifying requirements for chamfered plain washers of the normal series in product grade A (edition 2, published June 2000).
Q: What does it cover?
A: It covers nominal sizes, dimensional tolerances (hole, outer diameter, thickness), chamfer geometry, product grade A criteria and technical delivery conditions (including guidance on hardness classes and surface roughness) for metric chamfered plain washers.
Q: Who typically uses it?
A: Manufacturers and suppliers of washers and fasteners, design and mechanical engineers, quality/inspection teams and procurement professionals who need standardized washer specifications for production and assembly.
Q: Is it current or superseded?
A: ISO 7090:2000 remains the published edition (edition 2). The standard was reviewed and its status has been confirmed in ISO system reviews; a committee draft to revise ISO 7090 has been recorded as under development, indicating future revision work. Users should check for any newer national adoptions or a published revision if up-to-date compliance is required.
Q: Is it part of a series?
A: Yes — ISO 7090 is one of a set of ISO standards addressing plain washers and related fastener components (for example ISO 7089 and ISO 7091) and is managed under ISO/TC 2 (Fasteners).
Q: What are the key keywords?
A: Plain washer, chamfered, normal series, product grade A, tolerances, dimensions, ISO 7090, fasteners, hardness, surface finish.