ISO 887-2000 PDF

Full title and description

ISO 887:2000 — Plain washers for metric bolts, screws and nuts for general purposes — General plan. Specifies the nominal-dimension system and preferred combinations for plain (flat) washers of product grades A and C intended for general-purpose metric bolts, screws and nuts (nominal thread diameters 1 mm to 150 mm). Includes informative guidance on washer use (Annex A) and was issued with a corrigendum in 2006.

Abstract

This International Standard establishes the full range of nominal dimensions (clearance-hole diameters, outside diameters, thicknesses) and preferred combinations for plain washers used with metric general-purpose fasteners (product grades A and C). It is a general plan that refers users to specific product series and related standards for detailed tolerances and requirements.

General information

• Status: Published (international standard, edition 2 — current edition confirmed in ISO systematic reviews).
• Publication date: June 2000 (Edition 2, 2000).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 21.060.30 (Fasteners; washers, locking elements).
• Edition / version: Edition 2 (2000); corrected by ISO 887:2000/Cor 1:2006.
• Number of pages: 7 (ISO published document length).

Key bibliographic and lifecycle details (status, edition and corrigendum) are recorded in ISO metadata and national/adopted versions.

Scope

Specifies the nominal dimension ranges for plain washers of product-grade A and product-grade C used with metric general-purpose bolts, screws and nuts having nominal thread diameters from 1 mm to 150 mm inclusive. The standard is a general plan and is not intended to specify washer dimensions for screw-and-washer assemblies in relation to hole diameters and thicknesses; users should consult the referenced product standards and annex A (informative) for guidance on washer selection and use.

Key topics and requirements

• Definition of product grades A and C for plain washers.
• Selection and designation of clearance-hole diameters (references to hole-series standards where applicable).
• Standard outside diameters and preferred combinations with hole diameters and thicknesses.
• Thickness ranges for nominal thread sizes and associated dimensional limits.
• Tolerances and references to normative documents for dimensional and manufacturing tolerances.
• Annex A — informative guidance on the appropriate use of plain washers with bolts, screws and nuts.

These topics form the core of the general plan and direct users to companion standards for detailed product series and material/finish specifications.

Typical use and users

Used by mechanical design engineers, fastener and washer manufacturers, procurement and specification writers, quality and inspection personnel, standards committees, and educators. Typical applications include selection and specification of flat washers for general mechanical assemblies, creation of parts lists and procurement documents, and harmonization of national/adopted standards with ISO requirements.

Related standards

ISO 887 is part of the family of fastener and washer standards and is commonly used alongside standards that define hole series and thread dimensions (for example standards for hole series, metric screw threads and specific washer product standards). It is also adopted as EN ISO and by many national bodies (BS EN ISO 887, DIN EN ISO 887, national adoptions and reconfirmations). ISO 887:1983 is the withdrawn predecessor; ISO 887:2000 has an associated corrigendum issued in 2006.

Keywords

plain washer, flat washer, metric washer, product-grade A, product-grade C, nominal thread diameter, clearance hole, washer thickness, outside diameter, fasteners, ISO 887

FAQ

Q: What is this standard?

A: ISO 887:2000 is an International Standard that defines the general plan for plain washers for metric bolts, screws and nuts used for general purposes, specifying nominal dimension ranges and preferred dimensional combinations.

Q: What does it cover?

A: It covers nominal dimensions (clearance holes, outside diameters, thicknesses), preferred combinations for product grades A and C, tolerances references and informative guidance on washer use (Annex A). It applies to nominal thread diameters from 1 mm to 150 mm and is not intended for screw-and-washer assemblies where specific hole/thickness pairing rules apply.

Q: Who typically uses it?

A: Mechanical designers, fastener and washer manufacturers, purchasing/specification teams, quality/inspection staff, standards committees and educators working with metric fasteners and washer specifications.

Q: Is it current or superseded?

A: Edition 2 (ISO 887:2000) is the current edition of this International Standard; it was issued in 2000, corrected by a 2006 corrigendum, and the edition has been subject to ISO systematic review processes (the document has been confirmed in ISO reviews). The 1983 edition is the withdrawn predecessor.

Q: Is it part of a series?

A: Yes — ISO 887 is part of a set of fastener/washer-related standards. It provides a general plan and references more specific product series and companion standards (e.g., standards for hole series and thread dimensions). Many national and regional standards bodies publish adopted versions (EN/BS/DIN/AS adoptions) that align with ISO 887.

Q: What are the key keywords?

A: plain washer, flat washer, metric fasteners, product-grade A, product-grade C, clearance hole, outside diameter, thickness, tolerances.