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ISO 7720:2012

(Main)

Prevailing torque type all-metal hexagon nuts, style 2 — Property class 9

Prevailing torque type all-metal hexagon nuts, style 2 — Property class 9

ISO 7720:2012 specifies the characteristics of prevailing torque type all-metal hexagon nuts, of style 2, with threads from M5 up to and including M36, in product grade A for threads up to and including M16, and product grade B for threads over M16, and with property class 9.

Écrous hexagonaux autofreinés tout métal, style 2 — Classe de qualité 9

General Information

Status
Published
Publication Date
31-May-2012
ICS
21.060.20 - Nuts
Technical Committee
ISO/TC 2/SC 12 - Fasteners with metric internal thread
Drafting Committee
ISO/TC 2/SC 12 - Fasteners with metric internal thread
Current Stage
9092 - International Standard to be revised
Completion Date
17-Dec-2021
Ref Project

Relations

Revises
ISO 7720:1997 - Prevailing torque type all-metal hexagon nuts, style 2 — Property class 9
Effective Date
19-Jan-2012

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ISO 7720:2012 - Prevailing torque type all-metal hexagon nuts, style 2 -- Property class 9ISO 7720:2012 - Prevailing torque type all-metal hexagon nuts, style 2 -- Property class 9
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ISO 7720:2012 - Prevailing torque type all-metal hexagon nuts, style 2 -- Property class 9
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INTERNATIONAL ISO
STANDARD 7720
Third edition
2012-06-01
Prevailing torque type all-metal hexagon
nuts, style 2 — Property class 9
Écrous hexagonaux autofreinés tout métal, style 2 — Classe de qualité 9
Reference number
ISO 7720:2012(E)
©
ISO 2012

---------------------- Page: 1 ----------------------
ISO 7720:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
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 either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 7720:2012(E)
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 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 7720 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 12, Fasteners with
metric internal thread.
This third edition cancels and replaces the second edition (ISO 7720:1997), which has been technically revised.
© ISO 2012 – All rights reserved iii

---------------------- Page: 3 ----------------------
INTERNATIONAL STANDARD ISO 7720:2012(E)
Prevailing torque type all-metal hexagon nuts, style 2 —
Property class 9
1 Scope
This International Standard specifies the characteristics of prevailing torque type all-metal hexagon nuts, of
style 2, with threads from M5 up to and including M36, in product grade A for threads up to and including M16,
and product grade B for threads over M16, and with property class 9.
NOTE 1 The dimensions of the nuts, with the exception of the dimensions m and h , correspond to those given in
w max
ISO 4033.
NOTE 2 Nuts of property classes 5, 8, 10 and 12 are dealt with in ISO 7042.
If other specifications are required, they can be selected from existing International Standards, for example
ISO 261, ISO 724, ISO 898-2, ISO 965-2, ISO 2320 and ISO 4759-1.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
ISO 225, Fasteners — Bolts, screws, studs and nuts — Symbols and descriptions of dimensions
ISO 261, ISO general purpose metric screw threads — General plan
ISO 724, ISO general-purpose metric screw threads — Basic dim
...

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