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 document 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).

ISO draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s) which may be required to implement this document. However, implementers are cautioned that this may not represent the latest information, which may be obtained from the patent database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.

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

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 11, Fasteners with metric external thread, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 185, Fasteners, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 7435:1983), which has been technically revised.

The main changes are as follows:

— for short standard lengths, the lengths of the short dog points z have been added in Table 1;
— the lengths for M1,6 (l = 3 mm), M3 (l = 4 mm) and M3,5 (l = 6 mm) have been classified separately as short standard lengths with l_nom calculated in order to get at least 2,5 full pitches; the lengths for M10 (l = 16 mm) and M12 (l = 20 mm) have been classified as regular standard lengths with l_nom calculated in order to get at least 4 full pitches;
— for stainless steel screws, grades A2 and A4 with hardness classes 12H and 21H have been added;
— non-ferrous metal screws have been deleted (as a consequence of the withdrawal of ISO 8839);
— for steel fasteners, “plain” has been changed to “as processed”, and non-electrolytically applied zinc flake coating has been added in Table 3;
— for stainless steel fasteners, “plain” has been changed to “Clean and bright”, and “Passivated” has been added in Table 3;
— the requirement of surface integrity has been added for steel screws in Table 3;
— specifications for marking and labelling have been added as Clause 6.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

BS EN ISO 7435:2024

Fasteners. Slotted set screws with dog point

Current

Published:

31 Jul 2024