ISO 9199:1987

IS0
INTERNATIONAL STANDARD
9199
First edition
1987-08-1 5
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
ORGANISATION INTERNATIONALE DE NORMALISATION
Il0 CTAHAAPTMMUMM
MEXAYHAPOAHAR OPTAHMJAUMR
Aerospace - Self-locking bihexagonal nuts,
classifications 1 100 MPa/650 OC, 1250 MPa/760 OC,
1 550 MPa/235 OC and 1 550 MPa/650 OC - Dimensions
Aéronautique et espace - Écrous bihexagonaux à freinage interne, classifications
1 100 MPal650 OC, 1 250 MPal760 OC, 1 550 MPal235 OC et 1 550 MPal650 OC -
Dimensions
Reference number
IS0 9199: 1987 (E)

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Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 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, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 9199 was prepared by Technical Committee ISO/TC 20,
Aircraft and space vehicles.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
O International Organization for Standardization, 1987
Printed in Switzerland

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IS0 9199 : 1987 (E)
INTERNATIONAL STANDARD
Aerospace - Self-locking bihexagonal nuts,
classifications 1 100 MPa/650 OC, 1250 MPa/760 OC,
1 550 MPa/235 OC and 1 550 MPa/650 OC - Dimensions
I) O Introduction
- possible surface coating(s1’);
The dimensions laid down in this International Standard have
- procurement specification, i.e. either IS0 5858 or
been specified so that the requirements laid down in the ap-
IS0 8641 ;
propriate procurement specification, either IS0 5858 or
IS0 8641 (depending on the classification of the nut), are com-
- designation;
plied with.
- marking.
1 Scope
This International Standard lays down the dimensions for 3 References
bihexagonal nuts, with a self-locking feature achieved by form-
IS0 4095. Fasteners for aerospace construction - Bihex-
ing the upper portion out-of-round and having the following
agonal wrenching configuration.
classifications :
IS0 58551, Aerospace construction - MJ threads - Part I:
- 1 100 MPal650 OC;
Basic profile.
- 1 250 MPal760 OC;
IS0 5855-2, Aerospace
...