ISO 245:1998

Aerospace - Lockwire - Diameters

Aéronautique et espace — Fils à freiner — Diamètres

General Information

• Status: Published
• Publication Date: 11-Mar-1998
• ICS: 49.030.50 - Washers and other locking elements
• Technical Committee: ISO/TC 20/SC 4 - Aerospace fastener systems
• Drafting Committee: ISO/TC 20/SC 4 - Aerospace fastener systems
• Current Stage: 9060 - Close of review
• Completion Date: 04-Mar-2030

Relations

• Revises: ISO 245:1986 - Aircraft - Lockwire
• Effective Date: 15-Apr-2008

Overview - ISO 245:1998 (Aerospace - Lockwire - Diameters)

ISO 245:1998 is the International Standard that defines the diameters of lockwire used in the aerospace industry. Published as the second edition in March 1998, it was prepared by ISO/TC 20 (Aircraft and space vehicles), Subcommittee SC 4 (Aerospace fastener systems). The standard is intended for use in the compilation of aerospace product standards and provides dimensional requirements referenced by designers, manufacturers and quality authorities. Dimensions and tolerances in the document are expressed in millimetres and are illustrated in an accompanying figure and table.

Key Topics and Requirements

• Scope: Specifies the nominal diameters and associated tolerances for lockwire used in aerospace applications.
• Configuration and dimensions: Includes a figure (figure 1) and a tabulated listing (table 1) showing the accepted lockwire diameters and the permitted tolerances.
• Units and tolerances: All dimensions and tolerances are given in millimetres to ensure consistency across product specifications and manufacturing.
• Standard maintenance: This edition cancels and replaces the 1986 edition (ISO 245:1986), indicating an update to the technical requirements.

Note: ISO 245:1998 focuses specifically on diameters. It does not cover material specification, manufacturing methods, or installation procedures for lockwire.

Applications and Who Uses This Standard

ISO 245:1998 is directly useful for professionals involved in aerospace fastener selection and documentation:

• Aerospace design engineers specifying lockwire diameters for assemblies and lockwire holes in components.
• Fastener and wire manufacturers producing lockwire to fit aerospace specifications.
• Procurement and supply-chain teams ensuring received lockwire matches specified diameters and tolerances.
• Quality assurance and inspection personnel verifying compliance with dimensional tolerances.
• Maintenance, repair and overhaul (MRO) organizations standardizing replacement parts and procedures.

Practical uses include specifying lockwire sizes on engineering drawings, defining acceptance criteria for incoming inspection, and harmonizing supplier product data to prevent misfits or functional failures.

Related Standards

ISO 245:1998 is part of the body of standards addressing aerospace fastener systems prepared by ISO/TC 20/SC 4. For complete product specifications, it is typically used alongside other aerospace standards covering fastener dimensions, materials, installation practices and quality requirements. When creating or auditing aerospace product documents, reference ISO 245:1998 for diameter requirements and consult related fastener and material standards for full guidance.

Keywords: ISO 245:1998, aerospace lockwire diameters, lockwire, aircraft industry, lockwire holes, diameters, aerospace fastener systems.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 245
Second edition
1998-03-01
Aerospace — Lockwire — Diameters
Aéronautique et espace — Fils à freiner — Diamètres
A
Reference number
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national standards bodies (ISO member bodies). The work of
preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be represented
on that committee. International organizations, governmental and non-
governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 245 was prepared by Technical Committee
ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace
fastener systems.
This second edition cancels and
...

NORME ISO
INTERNATIONALE 245
Deuxième édition
1998-03-01
Aéronautique et espace — Fils à freiner —
Diamètres
Aerospace — Lockwire — Diameters
A
Numéro de référence
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération
mondiale d'organismes nationaux de normalisation (comités membres de
l'ISO). L'élaboration des Normes internationales est en général confiée aux
comités techniques de l'ISO. Chaque comité membre intéressé par une
étude a le droit de faire partie du comité technique créé à cet effet. Les
organisations internationales, gouvernementales et non gouvernementales,
en liaison avec l'ISO, participent également aux travaux. L'ISO collabore
étroitement avec la Commission électrotechnique internationale (CEI) en
ce qui concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptés par les comités techniques
sont soumis aux comités membres pour vote. Leur publication comme
Normes internationales requiert l'approbation de 75 % au moins des
comités membres votants.
La Norme internationale ISO 245 a été élaborée par le comité technique
ISO/TC 20, Aéronautique et espace, sous-comité SC 4, Éléments de
fixation pour constructions aérospatiales.
Cette deuxième édition annule et remplace la première édition
(ISO 245:1986), do
...