ISO 225-2010 PDF

Full title and description

St ISO 225-2010 — Fasteners — Bolts, screws, studs and nuts — Symbols and descriptions of dimensions. This international standard defines the symbols and provides descriptive designations for the dimensions of bolts, screws, studs and nuts for use in product standards and technical drawings (multilingual text: English, French, Russian, with equivalent terms in several other languages).

Abstract

ISO 225:2010 specifies the common symbols and descriptions used when dimensioning and designating bolts, screws, studs and nuts. Figures are shown as examples only. The document supplies terms in the three ISO official languages and gives equivalent terms in additional languages to support harmonized use in international standards and drawings.

General information

• Status: Published (International Standard, confirmed in systematic reviews).
• Publication date: 2010-10 (Edition 3, published October 2010).
• Publisher: International Organization for Standardization (ISO); available also as EN ISO 225:2010 via CEN members and national bodies.
• ICS / categories: 21.060.10 (Bolts, screws, studs) and 21.060.20 (Nuts).
• Edition / version: Edition 3 (2010).
• Number of pages: 57 pages (official ISO publication pagination).

Scope

ISO 225:2010 provides the symbols and descriptive designations of dimensional features for bolts, screws, studs and nuts to be used consistently across product standards and technical drawings. It standardizes terminology in the ISO official languages (English, French, Russian) and gives equivalents in other languages to aid international use; figures are illustrative and the standard is intended for application by standards writers, designers and drafters rather than as a manufacturing specification.

Key topics and requirements

• Standardized symbols for dimensions of bolts, screws, studs and nuts (head types, thread extents, shoulder/run‑out, etc.).
• Descriptions and definitions of dimensional terms used in product standards and drawings.
• Multilingual terminology: official ISO languages plus equivalent terms in additional languages to support international harmonization.
• Illustrative figures provided as examples (not prescriptive manufacturing drawings).

Typical use and users

Used by standards committees, product standards authors, mechanical design engineers, technical drafters/CAD specialists, fastener manufacturers, quality and inspection engineers, and procurement/specification writers to ensure consistent dimensioning and terminology across drawings and standards. The standard is primarily a vocabulary and symbol reference rather than a performance/specification document.

Related standards

Often referenced alongside other fastener standards (for example various ISO fastener product standards such as ISO 4014/4017 for hexagon head bolts, thread standards, and EN adoptions). It is also published/adopted as EN ISO 225:2010 in the European system. Users should consult related ISO and regional product standards for dimensional tolerances, mechanical properties and material requirements.

Keywords

fasteners, bolts, screws, studs, nuts, symbols, dimensioning, designations, terminology, ISO 225, EN ISO 225, technical drawings, multilingual terminology

FAQ

Q: What is this standard?

A: ISO 225:2010 (St ISO 225-2010) is an international standard that defines symbols and descriptive designations for the dimensions of bolts, screws, studs and nuts to be used in product standards and engineering drawings.

Q: What does it cover?

A: It covers the standard symbols, dimensional terms and their descriptions (with illustrative figures) and provides terms in the ISO official languages plus equivalents in additional languages to support consistent international use. The figures are illustrative and the document is intended as a reference for standardization and drawing practice.

Q: Who typically uses it?

A: Standards writers, mechanical designers, CAD/drafting professionals, fastener manufacturers, quality inspectors and procurement/specification teams who need harmonized symbols and terminology for dimensioning fasteners.

Q: Is it current or superseded?

A: ISO 225:2010 is the current published edition (Edition 3, 2010) that replaced the 1983 edition; it has been subject to regular ISO systematic reviews and remains published/confirmed. Users should check with their national standards body for any later revisions or withdrawals that may apply locally.

Q: Is it part of a series?

A: ISO 225:2010 is a vocabulary/symbols standard for fasteners rather than a multipart series; it complements numerous product-specific ISO fastener standards (bolts, screws, nuts, thread forms) and is maintained by ISO technical committees responsible for fasteners.

Q: What are the key keywords?

A: fasteners; bolts; screws; studs; nuts; symbols; dimensioning; designations; terminology; ISO 225; EN ISO 225.