ISO 12280:1999
(Main)Aerospace - Retainers, spring, sheet metal, for self-locking barrel nuts - Dimensions
Aerospace - Retainers, spring, sheet metal, for self-locking barrel nuts - Dimensions
This International Standard specifies the dimensions of sheet metal spring retainers intended for use with selflocking barrel nuts, ISO 12278. This International Standard is only applicable for the compilation of aerospace product standards.
Aéronautique et espace — Ressorts de retenue en tôle pour écrous à portée cylindrique, à freinage interne — Dimensions
La présente Norme internationale spécifie les dimensions des ressorts de retenue en tôle destinés à être utilisés sur les écrous à portée cylindrique, à freinage interne, ISO 12278. La présente Norme internationale est applicable uniquement à l'élaboration de normes de produit destinées aux constructions aérospatiales.
General Information
- Status
- Published
- Publication Date
- 20-Oct-1999
- 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
Overview
ISO 12280:1999 defines the dimensions of sheet‑metal spring retainers used with self‑locking barrel nuts in aerospace assemblies. Intended specifically for the compilation of aerospace product standards, this International Standard ensures consistent geometry, tolerances and basic functional requirements for retainers that secure self‑locking barrel nuts (see ISO 12278). Dimensions and tolerances are expressed in millimetres and apply after any surface coating(s).
Key topics and technical requirements
- Scope: Dimensional specification for sheet‑metal spring retainers intended for use with self‑locking barrel nuts (ISO 12278). Applicable only for aerospace product standards.
- Normative reference: ISO 12278 (barrel nuts) is referenced for nut outline and installation hole requirements.
- Configuration and supply condition:
- Retainers are supplied in the open position.
- The standard provides figure(s) showing retainer geometry and interaction with the barrel nut.
- Retainer types:
- Code A (Index type) - used in blind areas where an index feature in the hole prevents retainer rotation or vertical movement.
- Code B (Clearance type) - used where the nut is accessible or where a through‑bolt hole in the far side of the barrel cavity is undesirable.
- Push‑out force: Code B retainers and the assembled nut require a specified push‑out force when installed in the hole defined by ISO 12278; values are given in Table 1.
- Dimensional data: Table 1 lists diameter codes (e.g., 060 through 390), multiple dimensional parameters (A, B, C, D, E, F, H, S, T) and corresponding push‑out force values. All dimensions and tolerances are in millimetres.
Applications and users
ISO 12280:1999 is practical for:
- Aerospace design engineers specifying fastener retention for aircraft and space hardware
- Mechanical designers creating mating parts and installation holes per ISO 12278
- Quality and procurement teams ensuring incoming retainers match aerospace dimensional requirements
- Standards writers compiling aerospace product standards and parts lists
- Maintenance and repair organizations verifying replacement retainers meet original dimensional and functional criteria
Practical benefits include reliable anti‑rotation/retention behavior, consistent push‑out characteristics for assembly/disassembly, and interchangeability across suppliers when used with ISO 12278 barrel nuts.
Related standards
- ISO 12278:1999 - Nuts, barrel, self‑locking (referenced normative document for nut outline and installation holes)
- Other ISO/TC 20 aerospace fastener system standards (for designers and specifiers to consult when integrating fasteners into product standards)
Keywords: ISO 12280:1999, aerospace retainers, spring sheet metal retainers, self‑locking barrel nuts, dimensions, ISO 12278, push‑out force, fastener standards.
ISO 12280:1999 - Aerospace -- Retainers, spring, sheet metal, for self-locking barrel nuts -- Dimensions
ISO 12280:1999 - Aéronautique et espace -- Ressorts de retenue en tôle pour écrous a portée cylindrique, a freinage interne -- Dimensions
Frequently Asked Questions
ISO 12280:1999 is a standard published by the International Organization for Standardization (ISO). Its full title is "Aerospace - Retainers, spring, sheet metal, for self-locking barrel nuts - Dimensions". This standard covers: This International Standard specifies the dimensions of sheet metal spring retainers intended for use with selflocking barrel nuts, ISO 12278. This International Standard is only applicable for the compilation of aerospace product standards.
This International Standard specifies the dimensions of sheet metal spring retainers intended for use with selflocking barrel nuts, ISO 12278. This International Standard is only applicable for the compilation of aerospace product standards.
ISO 12280:1999 is classified under the following ICS (International Classification for Standards) categories: 49.030.99 - Other fasteners. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 12280:1999 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 12280
First edition
1999-11-01
Aerospace — Retainers, spring, sheet
metal, for self-locking barrel nuts —
Dimensions
Aéronautique et espace — Ressorts de retenue en tôle pour écrous à
portée cylindrique, à freinage interne — 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 12280 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,
Subcommittee SC 4, Aerospace fastener systems.
© ISO 1999
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
INTERNATIONAL STANDARD © ISO ISO 12280:1999(E)
Aerospace — Retainers, spring, sheet metal, for self-locking barrel
nuts — Dimensions
1 Scope
This International Standard specifies the dimensions of sheet metal spring retainers intended for use with self-
locking barrel nuts, ISO 12278.
This International Standard is only applicable for the compilation of aerospace product standards.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publicati
...
NORME ISO
INTERNATIONALE 12280
Première édition
1999-11-01
Aéronautique et espace — Ressorts de
retenue en tôle pour écrous à portée
cylindrique, à freinage interne —
Dimensions
Aerospace — Retainers, spring, sheet metal, for self-locking barrel nuts —
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 12280 a été élaborée par le comité technique ISO/TC 20, Aéronautique et espace,
sous-comité SC 4, Éléments de fixation pour constructions aérospatiales.
© ISO 1999
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque
forme que ce soit et par aucun procédé, 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
NORME INTERNATIONALE © ISO ISO 12280:1999(F)
Aéronautique et espace — Ressorts de retenue en tôle pour
écrous à portée cylindrique, à freinage interne — Dimensions
1 Domaine d’application
La présente Norme internationale spécifie les dimensions des ressorts de retenue en tôle destinés à être utilisés
sur les écrous à portée cylindrique, à freinage interne, ISO 12278.
La présente Norme internationale est applicable uniquement à l'élaboration de normes de produit destinées aux
constructions aérospatiales.
2 Référence normative
Le document normatif suivant contient des dispositions qui, par suite de la référence qui y est faite, constituent des
dispositions valables pour la présente Norme internationale. Pour les références datées, les amendements
ultérieurs ou les révisions de ces publications ne s'appliquent
...
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