oSIST prEN ISO 8673:2016

Hexagon regular nuts (style 1), with fine pitch thread - Product grades A and B (ISO/DIS 8673:2016)

2017-11-17: Project cancelled in ISO/CS (see dataservice on 2017-11-16).

Sechskantmuttern (Typ 1) mit Feingewinde - Produktklassen A und B (ISO/DIS 8673:2016)

Diese Internationale Norm legt Eigenschaften von Sechskantmuttern (Typ 1) mit Feingewinde mit Nenndurchmessern von 8 mm bis 64 mm fest. Für die Gewindenenndurchmesser D ≤ 16 mm gilt Produktklasse A und für die Gewindenenndurchmesser D > 16 mm Produktklasse B.

Écrous hexagonaux normaux (style 1), à pas fin - Grades A et B (ISO/DIS 8673:2016)

Šestrobe matice (tip 1) z drobnim metrskim navojem - Razreda izdelave A in B (ISO/DIS 8673:2016)

General Information

• Status: Not Published
• Public Enquiry End Date: 26-Jun-2016
• ICS: 21.040.10 - Metric screw threads
• ICS: 21.060.20 - Nuts
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 21-Jan-2020
• Due Date: 26-Jan-2020
• Completion Date: 21-Jan-2020
• Ref Project: prEN ISO 8673 - Hexagon regular nuts (style 1), with fine pitch thread - Product grades A and B (ISO/DIS 8673:2016)

Relations

• Revised: SIST EN ISO 8673:2013 - Hexagon nuts, style 1, with metric fine pitch thread - Product grades A and B (ISO 8673:2012)
• Effective Date: 18-Jan-2023
• Revised: SIST EN ISO 8673:2013 - Hexagon nuts, style 1, with metric fine pitch thread - Product grades A and B (ISO 8673:2012)
• Effective Date: 01-Jun-2016

Overview

prEN ISO 8673 / ISO/DIS 8673:2016 is a draft International Standard covering hexagon regular nuts (style 1) with fine pitch metric threads. The draft specifies dimensions, product grades and basic requirements for nuts with nominal diameters from 8 mm to 64 mm, with product grade A for D ≤ 16 mm and product grade B for D > 16 mm. The document circulated as an ISO draft in 2016 but the project was later cancelled in ISO/CS (see dataservice 2017‑11‑16/17); it therefore should be treated as a draft and not a published ISO standard.

Key Topics

• Scope and product grades: Fine-pitch hexagon nuts, D = 8–64 mm; grade A (smaller diameters) and grade B (larger diameters).
• Dimensions and thread sizes: Figures and tables define dimensions. Preferred fine-pitch threads include M8×1,25, M10×1, M12×1,5, M16×1,5, M20×2, M24×2, M30×2, M36×3, M42×3, M48×3, M56×4, M64×4. Additional non-preferred sizes are also given.
• Thread tolerancing: Internal thread tolerance class 6H and references to ISO general-purpose thread series (ISO 262, ISO 724, ISO 965‑2).
• Mechanical properties and materials:
  • Steel nuts: Mechanical property classes and heat treatment (quenching and tempering) referenced to ISO 898‑2; property classes include 6, 8 and 10 (with class 10 extended across a wider diameter range in the draft).
  • Stainless steel nuts: Property classes and requirements referenced to ISO 3506‑2.
  • Non-ferrous nuts: Deleted in this draft (consequence of withdrawal of ISO 8839).
• Surface finish and coatings: Electroplating (ISO 4042), zinc‑flake coatings (ISO 10683), passivation of stainless steel (ISO 16048).
• Quality and inspection: Surface discontinuity limits (ISO 6157‑2) and acceptance inspection (ISO 3269).
• Designation example: “Hexagon regular nut ISO 8673 – M16 × 1,5 – 8”.

Applications

• Ensures interchangeability and reliable performance of fine‑pitch hexagon nuts used in machinery, automotive assemblies, industrial equipment, and precision engineering.
• Used by:
  • Fastener manufacturers for production tolerances and heat‑treatment decisions.
  • Design and mechanical engineers selecting appropriate nut sizes, threads and property classes.
  • Procurement and quality control teams for acceptance testing and supplier specification.
  • Standards bodies and testing labs for conformity assessment and comparison with other metric fastener standards.

Related Standards

Key normative references included in the draft:

• ISO 225, ISO 262, ISO 724, ISO 965‑2 (metric threads)
• ISO 898‑2 (mechanical properties of steel nuts)
• ISO 3506‑2 (corrosion‑resistant stainless steel nuts)
• ISO 4759‑1 (tolerances for fasteners)
• ISO 4042, ISO 10683, ISO 16048 (finish/coating standards)
• ISO 6157‑2, ISO 3269 (surface and inspection)
• ISO/TR 16224 (nut design guidance)

Note: Because the ISO/CS record shows the project as cancelled (2017), consult the ISO and national standards databases or national adoption documents for the latest status before citing or applying this draft in procurement or design.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2016
Šestrobe matice (tip 1) z drobnim metrskim navojem - Razreda izdelave A in B
(ISO/DIS 8673:2016)
Hexagon regular nuts (style 1), with fine pitch thread - Product grades A and B (ISO/DIS
8673:2016)
Écrous hexagonaux normaux (style 1), à pas fin - Grades A et B (ISO/DIS 8673:2016)
Ta slovenski standard je istoveten z: prEN ISO 8673
ICS:
21.040.10 Metrski navoji Metric screw threads
21.060.20 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 8673
ISO/TC 2/SC 12 Secretariat: DIN
Voting begins on: Voting terminates on:
2016-03-31 2016-06-29
Hexagon regular nuts (style 1), with fine pitch thread —
Product grades A and B
Écrous hexagonaux normaux (style 1) à filetage métrique à pas fin — Grades A et B
ICS: 21.060.20
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel three month enquiry.
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.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 8673:2016(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

ISO/DIS 8673:2016(E)
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

ISO/DIS 8673:2016(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 a re
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 an d 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 8673:2012).
This standard differs from ISO 8673:2012 as follows:
— the Scope has been updated;
— threads M10x1,25 and M20x2 have been moved to preferred threads table;
— non-preferred threads have been completed;
— for steel nuts, quenching and tempering have been specified in accordance with ISO 898-2 as
mandatory or optional;
— for steel nuts, the property class 10 has been extended to the whole diameter range;
— the reference to ISO/TR 16224 for nut design has been added;
— for stainless steel nuts, the property classes have been revised in accordance with diameter ranges;
— non-ferrous metal nuts have been deleted as a consequence of withdrawal of ISO 8839.
ISO/DIS 8673:2016(E)
Hexagon regular nuts (style 1), with fine pitch thread — Product
grades A and B
1 Scope
This International Standard specifies the characteristics of hexagon regular nuts (style 1) with fine pitch
thread, with nominal diameter from 8 mm through 64 mm, with product grade A for nominal diameters
D  16 mm and product grade B for nominal diameters D  16 mm.
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
...