ISO/DIS 7043

Prevailing torque hexagon high nuts with flange (with non-metallic insert) -- Product grades A and B

Écrous hexagonaux hauts à embase, autofreinés (à anneau non métallique) -- Grades A et B

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 7043
ISO/TC 2/SC 12 Secretariat: DIN
Voting begins on: Voting terminates on:
2016-03-31 2016-06-29
Prevailing torque hexagon high nuts with flange (with non-
metallic insert) — Product grades A and B

Écrous hexagonaux hauts à embase, autofreinés (à anneau non métallique) — Grades A et B

ICS: 21.060.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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Reference number
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ISO/DIS 7043:2016(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2016
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ISO/DIS 7043:2016(E)
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© ISO 2016, Published in Switzerland

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ii © ISO 2016 – All rights reserved
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ISO/DIS 7043:2016(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Dimensions ................................................................................................................................................................................................................. 1

4 Requirements and reference International Standards ................................................................................................ 4

5 Designation ................................................................................................................................................................................................................ 5

Annex A (informative) Gauging of hexagon nuts with flange ...................................................................................................... 6

Bibliography ................................................................................................................................................................................................................................ 8

© ISO 2016 – All rights reserved iii
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ISO/DIS 7043:2016(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 2, Fasteners, Subcommittee SC 12, Fasteners

with metric internal thread.
This fourth edition cancels and replaces the third edition (ISO 7043:2012).
This standard differs from (ISO 7043:2012 as follows:

— the title has been changed in order to address the nut size (high) instead of style 2;

— the Scope has been updated;
— the threads M7 and M18 have been added;
— r has been corrected for M18 (1,1 instead of 0,9);
max
— the property class 9 has been deleted;

— the mechanical properties and specified property classes have been updated in accordance with the

diameter ranges;

— for steel nuts, quenching and tempering have been specified in accordance with ISO 898-2 as

mandatory or optional;
— the reference to ISO/TR 16224 for nut design has been added;

— “prevailing torque with non-metallic insert” has been replaced by the symbol “PTNM” in the

designation.
iv © ISO 2016 – All rights reserved
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DRAFT INTERNATIONAL STANDARD ISO/DIS 7043:2016(E)
Prevailing torque hexagon high nuts with flange (with non-
metallic insert) — Product grades A and B
1 Scope

This International Standard specifies the characteristics of prevailing torque hexagon high nuts with

flange (with non-metallic insert), with coarse pitch thread from nominal diameter M5 through M20,

with product grade A for nominal diameter ≤ M16 and product grade B for nominal diameter > M16.

NOTE The dimensions of the nuts correspond to those given in ISO 4161 plus prevailing torque feature.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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 262, ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts

ISO 724, ISO general-purpose metric screw threads — Basic dimensions

ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 2: Nuts with

...