ISO 9199:1998
(Main)Aerospace - Nuts, bihexagonal, self-locking, MJ threads, classifications: 1 100 MPa (at ambient temperature)/425 degrees C, 1 100 MPa (at ambient temperature)/650 degrees C, 1 210 MPa (at ambient temperature)/425 degrees C, 1 210 MPa (at ambient temperature)/730 degrees C, 1 550 MPa (at ambient temperature)/235 degrees C, 1 550 MPa (at ambient temperature)/425 degrees C and 1 550 MPa (at ambient temperature)/600 degrees C - Dimensions
Aerospace - Nuts, bihexagonal, self-locking, MJ threads, classifications: 1 100 MPa (at ambient temperature)/425 degrees C, 1 100 MPa (at ambient temperature)/650 degrees C, 1 210 MPa (at ambient temperature)/425 degrees C, 1 210 MPa (at ambient temperature)/730 degrees C, 1 550 MPa (at ambient temperature)/235 degrees C, 1 550 MPa (at ambient temperature)/425 degrees C and 1 550 MPa (at ambient temperature)/600 degrees C - Dimensions
Aéronautique et espace — Écrous bihexagonaux à freinage interne, à filetage MJ, de classifications 1 100 MPa (à température ambiante)/425 degrés C, 1 100 MPa/650 degrés C, 1 210 MPa (à température ambiante)/425 degrés C, 1 210 MPa (à température ambiante)/730 degrés C, 1 550 MPa (à température ambiante)/235 degrés C, 1 550 MPa (à température ambiante)/425 degrés C et 1 550 MPa (à température ambiante)/600 degrés C — Dimensions
General Information
- Status
- Published
- Publication Date
- 04-Mar-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
- 06-Jun-2022
- Effective Date
- 15-Apr-2008
Overview
ISO 9199:1998 is an international standard developed by the International Organization for Standardization (ISO) that specifies the dimensions for aerospace-grade bihexagonal, self-locking nuts with MJ threads. These nuts are classified based on their mechanical properties, including tensile strength at ambient temperature and high-temperature resistance up to 730 °C. The standard is essential for ensuring the consistent quality and interchangeability of critical fasteners used in aircraft and space vehicle assemblies.
The nuts covered by ISO 9199 feature a distinctive bihexagonal shape with a self-locking mechanism achieved by forming the upper portion of the nut out-of-round. This design enhances the security of fastener assemblies under intense mechanical and thermal conditions commonly encountered in aerospace applications.
Key Topics
- Bihexagonal nuts with counterbore: The dual-hexagon configuration enlarges the wrench contact area, improving torque transmission and balance.
- Self-locking feature: Obtained by deforming the nut’s upper section to prevent loosening during vibration and thermal cycling.
- MJ threads: Special metric threads designed for aerospace fasteners, categorized by precise dimensions and tolerances.
- Classifications by tensile strength and temperature resistance
- 1 100 MPa at ambient/425 °C and 650 °C
- 1 210 MPa at ambient/425 °C and 730 °C
- 1 550 MPa at ambient/235 °C, 425 °C, and 600 °C
- Dimensional specifications: Tolerances and measurements are defined in millimeters, considering conditions after surface coating but before lubrication.
- Normative references: Related standards include ISO 4095 for wrenching configurations, ISO 5855-2 for MJ thread limit dimensions, ISO 5858 and ISO 8641 for procurement specifications of self-locking nuts at various temperature ranges, and ISO 8788 for tolerances on form and position.
Applications
ISO 9199 nuts are integral components in the aerospace industry, where safety and reliability are paramount. Their applications include:
- Aircraft assembly: Used in structural joints and engine components requiring precise mechanical properties and resilience to temperature extremes.
- Space vehicles: Fasteners that must withstand high tensile loads and thermal stresses encountered during mission profiles.
- High-performance aerospace systems: Components operating under vibration, thermal cycling, and dynamic loads leverage the self-locking feature for enhanced safety.
- Replacement and maintenance: Standardized dimensions facilitate the use of interchangeable nuts from different manufacturers, ensuring global supply chain consistency.
The application of this standard assures manufacturers and aerospace engineers of uniform quality, reliability, and performance of fasteners critical to aerospace safety and functionality.
Related Standards
For comprehensive aerospace fastener design and procurement, ISO 9199 should be used alongside the following standards:
- ISO 4095:1998 - Aerospace bihexagonal drives and wrenching configurations for metric series fasteners.
- ISO 5855-2:1988 - MJ threads limit dimensions for bolts and nuts.
- ISO 5858:1991 - Procurement specifications for self-locking nuts with maximum operating temperatures up to 425 °C.
- ISO 8641:1987 - Procurement specifications for self-locking nuts designed to operate above 425 °C.
- ISO 8788:1987 - Tolerances of form and position applicable to nuts, ensuring strict geometric conformity.
Conclusion
ISO 9199:1998 is a vital international standard detailing the dimensions and classifications of aerospace bihexagonal, self-locking nuts with MJ threads. It enables aerospace manufacturers and engineers to source and produce high-performance fastening solutions capable of enduring demanding temperature and mechanical conditions. By adhering to this standard, the aerospace sector can maintain high safety standards, interchangeability, and quality assurance across fastener inventories.
Keywords: ISO 9199, aerospace nuts, bihexagonal nuts, self-locking nuts, MJ threads, aerospace fasteners, high-temperature fasteners, aerospace standards, tensile strength, nut dimensions, aviation fasteners, space vehicle fasteners, ISO standards aerospace
ISO 9199:1998 - Aerospace -- Nuts, bihexagonal, self-locking, MJ threads, classifications: 1 100 MPa (at ambient temperature)/425 degrees C, 1 100 MPa (at ambient temperature)/650 degrees C, 1 210 MPa (at ambient temperature)/425 degrees C, 1 210 MPa (at ambient temperature)/730 degrees C, 1 550 MPa (at ambient temperature)/235 degrees C, 1 550 MPa (at ambient temperature)/425 degrees C and 1 550 MPa (at ambient temperature)/600 degrees C -- Dimensions
ISO 9199:1998 - Aéronautique et espace -- Écrous bihexagonaux a freinage interne, a filetage MJ, de classifications 1 100 MPa (a température ambiante)/425 degrés C, 1 100 MPa/650 degrés C, 1 210 MPa (a température ambiante)/425 degrés C, 1 210 MPa (a température ambiante)/730 degrés C, 1 550 MPa (a température ambiante)/235 degrés C, 1 550 MPa (a température ambiante)/425 degrés C et 1 550 MPa (a température ambiante)/600 degrés C -- Dimensions
Frequently Asked Questions
ISO 9199:1998 is a standard published by the International Organization for Standardization (ISO). Its full title is "Aerospace - Nuts, bihexagonal, self-locking, MJ threads, classifications: 1 100 MPa (at ambient temperature)/425 degrees C, 1 100 MPa (at ambient temperature)/650 degrees C, 1 210 MPa (at ambient temperature)/425 degrees C, 1 210 MPa (at ambient temperature)/730 degrees C, 1 550 MPa (at ambient temperature)/235 degrees C, 1 550 MPa (at ambient temperature)/425 degrees C and 1 550 MPa (at ambient temperature)/600 degrees C - Dimensions". This standard covers: Aerospace - Nuts, bihexagonal, self-locking, MJ threads, classifications: 1 100 MPa (at ambient temperature)/425 degrees C, 1 100 MPa (at ambient temperature)/650 degrees C, 1 210 MPa (at ambient temperature)/425 degrees C, 1 210 MPa (at ambient temperature)/730 degrees C, 1 550 MPa (at ambient temperature)/235 degrees C, 1 550 MPa (at ambient temperature)/425 degrees C and 1 550 MPa (at ambient temperature)/600 degrees C - Dimensions
Aerospace - Nuts, bihexagonal, self-locking, MJ threads, classifications: 1 100 MPa (at ambient temperature)/425 degrees C, 1 100 MPa (at ambient temperature)/650 degrees C, 1 210 MPa (at ambient temperature)/425 degrees C, 1 210 MPa (at ambient temperature)/730 degrees C, 1 550 MPa (at ambient temperature)/235 degrees C, 1 550 MPa (at ambient temperature)/425 degrees C and 1 550 MPa (at ambient temperature)/600 degrees C - Dimensions
ISO 9199:1998 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 9199:1998 has the following relationships with other standards: It is inter standard links to ISO 10722:2007, ISO 9199:1987. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 9199:1998 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 9199
Second edition
1998-03-15
Aerospace — Nuts, bihexagonal, self-
locking, MJ threads, classifications:
1 100 MPa (at ambient temperature)/425 °C,
1 100 MPa (at ambient temperature)/650 °C,
1 210 MPa (at ambient temperature)/425 °C,
1 210 MPa (at ambient temperature)/730 °C,
1 550 MPa (at ambient temperature)/235 °C,
1 550 MPa (at ambient temperature)/425 °C
and
1 550 MPa (at ambient temperature)/600 °C
— Dimensions
Aéronautique et espace — Écrous bihexagonaux à freinage interne, à
filetage MJ, classifications: 1 100 MPa (à température ambiante)/425 °C,
1 100 MPa (à température ambiante)/650 °C, 1 210 MPa (à température
ambiante)/425 °C, 1 210 MPa (à température ambiante)/730 °C, 1 550 MPa
(à température ambiante)/235 °C, 1 550 MPa (à température
ambiante)/425 °C et 1 550 MPa (à température ambiante)/600 °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.
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 9199 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 9199:1987),
of which it constitutes a technical revision.
© 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 central@iso.ch
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii
©
ISO ISO 9199:1998(E)
Introduction
The dimensions specified in this International Standard have been
determined to satisfy the requirements of the procurement specification of
ISO 5858 or ISO 8641, depending on the classification of the nut.
iii
©
INTERNATIONAL STANDARD ISO ISO 9199:1998(E)
Aerospace — Nuts, bihexagonal, self-locking, MJ threads,
classifications: 1 100 MPa (at ambient temperature)/425 °C,
1 100 MPa (at ambient temperature)/650 °C, 1 210 MPa (at ambient
temperature)/425 °C, 1 210 MPa (at ambient temperature)/730 °C,
1 550 MPa (at ambient temperature)/235 °C, 1 550 MPa (at ambient
temperature)/425 °C and 1 550 MPa (at ambient
temperature)/600 °C — Dimensions
1 Scope
This International Standard specifies the dimensions of bihexagonal nuts with counterbore and MJ threads and a
1) 2)
self-locking feature achieved by forming the upper portion out-of-round, for classifications: 1 100 MPa /425 °C ,
1) 2) 1) 2) 1) 2) 1) 2) 1) 2)
1 100 MPa /650 °C , 1 210 MPa /425 °C , 1 210 MPa /730 °C ,
...
NORME ISO
INTERNATIONALE 9199
Deuxième édition
1998-03-15
Aéronautique et espace — Écrous
bihexagonaux à freinage interne, à filetage MJ,
classifications:
1 100 MPa (à température ambiante)/425 °C,
1 100 MPa (à température ambiante)/650 °C,
1 210 MPa (à température ambiante)/425 °C,
1 210 MPa (à température ambiante)/730 °C,
1 550 MPa (à température ambiante)/235 °C,
1 550 MPa (à température ambiante)/425 °C et
1 550 MPa (à température ambiante)/600 °C —
Dimensions
Aerospace — Nuts, bihexagonal, self-locking, MJ threads, classifications:
1 100 MPa (at ambient temperature)/425 °C, 1 100 MPa (at ambient
temperature)/650 °C, 1 210 MPa (at ambient temperature)/425 °C,
1 210 MPa (at ambient temperature)/730 °C, 1 550 MPa (at ambient
temperature)/235 °C, 1 550 MPa (at ambient temperature)/425 °C and
1 550 MPa (at ambient temperature)/600 °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 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 9199 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 9199:1987),
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 central@iso.ch
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Imprimé en Suisse
ii
©
ISO ISO 9199:1998(F)
Introduction
Les dimensions prescrites dans la présente Norme internationale ont été
définies pour satisfaire aux exigences de la spécification d'approvisionnement
de l'ISO 5858 ou de l'ISO 8641, suivant la classification de l'écrou.
iii
©
NORME INTERNATIONALE ISO ISO 9199:1998(F)
Aéronautique et espace — Écrous bihexagonaux à freinage
interne, à filetage MJ, classifications: 1 100 MPa (à température
ambiante)/425 °C, 1 100 MPa (à température ambiante)/650 °C,
1 210 MPa (à température ambiante)/425 °C, 1 210 MPa (à
température ambiante)/730 °C, 1 550 MPa (à température
ambiante)/235 °C, 1 550 MPa (à température ambiante)/425 °C et
1 550 MPa (à température ambiante)/600 °C — Dimensions
1 Domaine d'application
La présente Norme internationale prescrit les dimensions des écrous bihexagonaux à filetage MJ, à freinage interne
1) 2) 1) 2)
par déformation de leur partie supérieure, de classifications: 1 100 MPa /425 °C , 1 100 MPa /650 °C ,
1) 2) 1) 2) 1) 2) 1) 2) 1) 2)
1 210 MPa /425 °C , 1 210 MPa /730 °C , 1 550 MPa /235 °C , 1 550 MPa /425 °C et 1 550 MPa /600 °C .
La présente Norme internationale est applicable uniqu
...
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