ISO 10484-1997 PDF

Full title and description

ISO 10484:1997 — Widening test on nuts. This International Standard specifies a mechanical test procedure (the "widening test") used to evaluate the acceptability of surface discontinuities in nuts as designated in ISO 6157-2; it excludes nuts made of free-cutting (automatic) steel and applies to specified property classes, nominal thread diameters and product grades.

Abstract

ISO 10484:1997 defines how to perform the widening test on nuts to determine whether surface discontinuities (as identified in ISO 6157-2) are acceptable for use. The procedure, acceptance criteria and special-case notes (for example for prevailing-torque type nuts) are presented in a concise, single-edition document. The original ISO edition was short (3 pages) and intended as a focused test-method specification.

General information

• Status: Withdrawn (the ISO record shows the 1997 edition as withdrawn / annulled; the text has been adopted in related EN/EN‑ISO publications).
• Publication date: October 1997 (Edition 1, 1997-10).
• Publisher: International Organization for Standardization (ISO); also available as adopted national / European publications (EN ISO / national bodies).
• ICS / categories: 21.060.20 — Nuts (mechanical fasteners).
• Edition / version: Edition 1 (1997).
• Number of pages: 3 (original ISO PDF). Note: adopted EN or national editions (EN ISO versions) may show different pagination.

Scope

This International Standard specifies the widening test procedure used to assess whether surface discontinuities listed in ISO 6157-2 are acceptable in nuts. It applies to nuts in property classes referenced to ISO 898-2 and ISO 898-6, for nominal thread diameters d from 5 mm up to and including 39 mm, and for product grades A and B; it does not apply to nuts made of free-cutting (automatic) steel. The test and acceptance criteria are intended for quality-control and conformance checks in manufacturing and inspection.

Key topics and requirements

• Definition and purpose of the widening test: removal to nominal diameter and passage of a tapered mandrel to reveal/assess surface discontinuities.
• Scope limits: applies to nuts with specified property classes (ISO 898-2, ISO 898-6), thread diameters 5–39 mm, product grades A and B; excludes free-cutting steel nuts.
• Acceptance criteria: criteria referenced to discontinuity classifications in ISO 6157-2; includes notes on special cases (for example prevailing‑torque nuts).
• Short, prescriptive test method intended for use in manufacturing inspection and conformity assessment (concise procedural language rather than extended commentary).

Typical use and users

Primary users are fastener manufacturers, quality-control and inspection laboratories, test houses, procurement engineers and standards/technical committees working on mechanical fasteners. The widening test is used as a production and acceptance test to ensure that nuts with surface discontinuities still meet safety and functional requirements for intended applications. National standards bodies and conformity assessment bodies also reference or adopt this test within regional or national standards packages.

Related standards

ISO 10484:1997 is closely related to and references other fastener standards, notably ISO 6157-2 (surface discontinuity designation), ISO 898-2 and ISO 898-6 (mechanical properties/classification for nuts), and regional/adopted editions such as EN ISO 10484:2004. It is also associated with earlier or superseded EN documents (for example EN 493:1992) where the EN system adopted or replaced equivalent procedures.

Keywords

widening test; nuts; fasteners; surface discontinuities; ISO 6157-2; ISO 898-2; ISO 898-6; acceptance test; mechanical inspection; EN ISO 10484.

FAQ

Q: What is this standard?

A: ISO 10484:1997 is an International Standard titled "Widening test on nuts" that defines a procedure to mechanically test nuts for acceptability of surface discontinuities.

Q: What does it cover?

A: It covers the test method (widening test), the scope of nuts to which the test applies (property classes per ISO 898‑2 / ISO 898‑6, nominal thread diameters 5–39 mm, product grades A and B), and the acceptance criteria referenced to ISO 6157-2; it excludes nuts made of free-cutting (automatic) steel.

Q: Who typically uses it?

A: Fastener manufacturers, quality and inspection laboratories, procurement and design engineers specifying nut acceptance criteria, and standards bodies or conformity-assessment organizations use the test and reference the standard.

Q: Is it current or superseded?

A: The ISO record lists ISO 10484:1997 as withdrawn (the published edition dates from October 1997). The procedure has been adopted in regional/national editions (for example EN ISO 10484:2004) and users should check the current national or regional adoption for applicable status; some national repositories record the ISO edition as withdrawn/annulled and give the withdrawal/ adoption timeline.

Q: Is it part of a series?

A: ISO 10484 is a narrow test-method standard that references other standards in the fasteners family (notably ISO 6157‑2 for discontinuity designation and ISO 898 parts for mechanical properties). It is typically used alongside related fastener standards rather than being a "part" of a numbered series.

Q: What are the key keywords?

A: Widening test, nuts, surface discontinuity, acceptance criteria, ISO 6157-2, ISO 898-2, ISO 898-6, EN ISO 10484.