ISO 3224:1998
(Main)Aerospace - Nuts, anchor, self-locking, floating, single lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 degrees C, 1 100 MPa (at ambient temperature )/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C - Dimensions
Aerospace - Nuts, anchor, self-locking, floating, single lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 degrees C, 1 100 MPa (at ambient temperature )/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C - Dimensions
This International Standard specifies the dimensions of self-locking, floating, single lug anchor nuts, with counterbore, with MJ threads, of classifications: 1 100 MPa 1)/235 °C 2), 1 100 MPa 1)/315 °C 2) and 1 100 MPa 1)/425 °C 2). This International Standard is only applicable for the compilation of aerospace product standards.
Aéronautique et espace — Écrous à river, à freinage interne, flottants, simple patte, avec chambrage, à filetage MJ, classifications: 1 100 MPa (à température ambiante)/235 degrés C, 1 100 MPa (à température ambiante)/315 degrés C et 1 100 MPa (à température ambiante)/425 degrés C — Dimensions
La présente Norme internationale spécifie les dimensions des écrous à river, à freinage interne, flottants, simple patte, avec chambrage, à filetage MJ, de classifications: 1 100 MPa1)/235 °C2), 1 100 MPa1)/315 °C2) et 1 100 MPa1)/425 °C2). La présente Norme internationale est applicable uniquement à l'élaboration de normes de produit destinées aux constructions aérospatiales.
General Information
- Status
- Published
- Publication Date
- 25-Nov-1998
- Technical Committee
- ISO/TC 20/SC 4 - Aerospace fastener systems
- Drafting Committee
- ISO/TC 20/SC 4 - Aerospace fastener systems
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 19-Oct-2021
- Completion Date
- 13-Dec-2025
Relations
- Effective Date
- 15-Apr-2008
Overview
ISO 3224:1998 is an aerospace product standard that specifies the dimensions for a specific class of nuts: self‑locking, floating, single‑lug anchor nuts with counterbore and MJ threads. It covers nuts of the classifications 1 100 MPa (at ambient temperature)/235 °C, 1 100 MPa/315 °C and 1 100 MPa/425 °C. The standard is intended for the compilation of aerospace product standards and ensures dimensional interchangeability and compatibility with related procurement specifications.
Key topics and requirements
- Part geometry and dimensions: Detailed configuration, dimension tables and figure references define external and internal dimensions expressed in millimetres.
- Threading: Applies to MJ threaded anchor nuts; limits and thread dimensions follow the MJ system referenced in ISO 5855‑2.
- Self‑locking and floating features: Specifies dimensions for the self‑locking zone and single‑lug floating configuration that allow for controlled movement and locking performance.
- Temperature classifications: Defines three maximum operating temperature classes (235 °C, 315 °C, 425 °C) tied to material/treatment and intended performance after exposure.
- Surface and assembly conditions: Dimensions apply after any surface coating(s) but before application of lubricant; the optional metallic cap must remain attached at maximum operating temperature (test conditions per ISO 5858).
- Tolerances and form: Tolerances of form and position are governed by ISO 8788; specific manufacturing details not stated are left to manufacturer discretion.
- Normative references: Includes ISO 5855‑2 (MJ threads limits), ISO 5858 (procurement specification for self‑locking nuts), and ISO 8788 (tolerances for nuts).
Applications and users
ISO 3224 is primarily used by:
- Aerospace fastener designers and engineers specifying anchor nuts for airframe and engine components.
- Manufacturers producing self‑locking, floating, single‑lug anchor nuts to ensure dimensional conformity.
- Procurement and quality assurance teams verifying parts against aerospace product standards.
- Maintenance and repair organizations selecting replacement fasteners compatible with MJ threads and high‑temperature service. Practical uses include panel attachment systems, bracket and lug assemblies where misalignment accommodation (floating lug) and secure locking at elevated temperatures are required.
Related standards
- ISO 5855‑2: MJ threads - limit dimensions for bolts and nuts.
- ISO 5858: Self‑locking nuts with maximum operating temperature ≤ 425 °C - procurement specification.
- ISO 8788: Fasteners - tolerances of form and position for nuts.
Keywords: ISO 3224, aerospace nuts, anchor nuts, self‑locking, floating single‑lug, MJ threads, dimensions, high‑temperature classification, aerospace fastener standards.
ISO 3224:1998 - Aerospace -- Nuts, anchor, self-locking, floating, single lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 degrees C, 1 100 MPa (at ambient temperature )/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C -- Dimensions
ISO 3224:1998 - Aéronautique et espace -- Écrous a river, a freinage interne, flottants, simple patte, avec chambrage, a filetage MJ, classifications: 1 100 MPa (a température ambiante)/235 degrés C, 1 100 MPa (a température ambiante)/315 degrés C et 1 100 MPa (a température ambiante)/425 degrés C -- Dimensions
Frequently Asked Questions
ISO 3224:1998 is a standard published by the International Organization for Standardization (ISO). Its full title is "Aerospace - Nuts, anchor, self-locking, floating, single lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 degrees C, 1 100 MPa (at ambient temperature )/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C - Dimensions". This standard covers: This International Standard specifies the dimensions of self-locking, floating, single lug anchor nuts, with counterbore, with MJ threads, of classifications: 1 100 MPa 1)/235 °C 2), 1 100 MPa 1)/315 °C 2) and 1 100 MPa 1)/425 °C 2). This International Standard is only applicable for the compilation of aerospace product standards.
This International Standard specifies the dimensions of self-locking, floating, single lug anchor nuts, with counterbore, with MJ threads, of classifications: 1 100 MPa 1)/235 °C 2), 1 100 MPa 1)/315 °C 2) and 1 100 MPa 1)/425 °C 2). This International Standard is only applicable for the compilation of aerospace product standards.
ISO 3224:1998 is classified under the following ICS (International Classification for Standards) categories: 49.030.30 - Nuts. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 3224:1998 has the following relationships with other standards: It is inter standard links to ISO 3224:1985. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 3224:1998 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 3224
Second edition
1998-11-15
Aerospace — Nuts, anchor, self-locking,
floating, single lug, with counterbore, with
MJ threads, classifications: 1 100 MPa (at
ambient temperature)/235 °C, 1 100 MPa (at
ambient temperature)/315 °C and 1 100 MPa
(at ambient temperature)/425 °C —
Dimensions
Aéronautique et espace — Écrous à river, à freinage interne, flottants,
simple patte, avec chambrage, à filetage MJ, classifications: 1 100 MPa (à
température ambiante)/235 °C, 1 100 MPa (à température
ambiante)/315 °C et 1 100 MPa (à température ambiante)/425 °C —
Dimensions
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.
International Standards are drafted in accordance with the rules given in
the ISO/IEC Directives, Part 3.
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 3224 was prepared by Technical Committee
ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace
fastener systems.
This second edition cancels and replaces the first edition (ISO 3224:1985),
which has been technically revised.
© ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
©
ISO ISO 3224:1998(E)
Introduction
The dimensions specified in this International Standard have been
determined to allow production of a part which will satisfy the requirements
of the procurement specification ISO 5858.
iii
©
INTERNATIONAL STANDARD ISO ISO 3224:1998(E)
Aerospace — Nuts, anchor, self-locking, floating, single lug,
with counterbore, with MJ threads, classifications: 1 100 MPa
(at ambient temperature)/235 °C, 1 100 MPa (at ambient
temperature)/315 °C and 1 100 MPa (at ambient
temperature)/425 °C — Dimensions
1 Scope
This International Standard specifies the dimensions of self-locking, floating, single lug anchor nuts, with
1) 2) 1) 2)
counterbore, with MJ threads, of classifications: 1 100 MPa /235 °C , 1 100 MPa /315 °C and
1) 2)
1 100 MPa /425 °C .
This International Standard is only applicable for the compilation of aerospace product standards.
2 Normative references
The following normative documents contain provisions which, through reference in this tex
...
NORME ISO
INTERNATIONALE 3224
Deuxième édition
1998-11-15
Aéronautique et espace — Écrous à river,
à freinage interne, flottants, simple patte,
avec chambrage, à filetage MJ,
classifications: 1 100 MPa (à température
ambiante)/235 °C, 1 100 MPa (à température
ambiante)/315 °C et 1 100 MPa
(à température ambiante)/425 °C —
Dimensions
Aerospace — Nuts, anchor, self-locking, floating, single lug, with
counterbore, with MJ threads, classifications: 1 100 MPa (at ambient
temperature)/235 °C, 1 100 MPa (at ambient temperature)/315 °C
and 1 100 MPa (at ambient temperature)/425 °C — Dimensions
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 Normes internationales sont rédigées conformément aux règles
données dans les Directives ISO/CEI, Partie 3.
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 3224 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 (ISO 3224:1985),
dont elle constitue une révision technique.
© ISO 1998
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publi-
cation ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun pro-
cédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord
écrit de l'éditeur.
Organisation internationale de normalisation
Case postale 56 • CH-1211 Genève 20 • Suisse
Internet iso@iso.ch
Imprimé en Suisse
ii
©
ISO ISO 3224:1998(F)
Introduction
Les dimensions spécifiées dans la présente Norme internationale ont été
définies pour permettre la production d'une pièce satisfaisant aux exigences de
la spécification d'approvisionnement ISO 5858.
iii
©
NORME INTERNATIONALE ISO ISO 3224:1998(F)
Aéronautique et espace — Écrous à river, à freinage interne,
flottants, simple patte, avec chambrage, à filetage MJ,
classifications: 1 100 MPa (à température ambiante)/235 °C,
1 100 MPa (à température ambiante)/315 °C et 1 100 MPa (à
température ambiante)/425 °C — Dimensions
1 Domaine d'application
La présente Norme internationale spécifie les dimensions des écrous à river, à freinage interne, flottants, simple
1) 2) 1) 2)
patte, avec chambrage, à filetage MJ, de classifications: 1 100 MPa /235 °C , 1 100 MPa /315 °C et
1) 2)
1 100 MPa /425 °C .
La présente Norme internationale est applicable uniquement à l'élaboration de normes de produit destinées aux
constructions aérospatiales.
2 Références normatives
Les documents normatifs suivants contiennent des dispositions qui, par suite de la référence qui y est faite,
constituent des dispositions valables pour la pré
...














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