prEN ISO 8674

Hexagon high nuts (style 2), with fine pitch thread - Product grades A and B (ISO/DIS 8674:2016)

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

Hohe Sechskantmuttern (Typ 2) mit Feingewinde - Produktklassen A und B (ISO/DIS 8674:2016)

Diese Internationale Norm legt Eigenschaften von Sechskantmuttern (Typ 2) mit Feingewinde mit Nenndurchmessern von 8 mm bis 39 mm fest. Für die Gewindenenndurchmesser D ≤ 16 mm gilt Produktklasse A und für die Gewindenenndurchmesser D > 16 mm Produktklasse B.

Écrous hexagonaux hauts (style 2), à pas fin - Grades A et B (ISO/DIS 8674:2016)

Šestrobe visoke matice (tip 2) z drobnim metrskim navojem - Razreda izdelave A in B (ISO/DIS 8674:2016)

General Information

• Status: Not Published
• ICS: 21.060.20 - Nuts
• Technical Committee: CEN/TC 185 - Threaded and nonthreaded mechanical fasteners and accessories
• Drafting Committee: CEN/TC 185 - Threaded and nonthreaded mechanical fasteners and accessories
• Current Stage: 4098 - Decision to abandon - Enquiry
• Due Date: 28-Feb-2017
• Completion Date: 16-Nov-2017
• Ref Project: oSIST prEN ISO 8674:2016 - Hexagon high nuts (style 2), with fine pitch thread - Product grades A and B (ISO/DIS 8674:2016)

Overview

This document summarizes prEN ISO 8674 (ISO/DIS 8674:2016) - a draft International Standard for hexagon high nuts (style 2) with fine pitch metric thread, covering nominal diameters from M8 through M39 and defining product grades A and B (Grade A: D ≤ 16 mm; Grade B: D > 16 mm). The draft specifies dimensions, thread selections (preferred and non‑preferred sizes), mechanical properties, tolerances and finish/coating requirements for fine‑pitch hexagon high nuts. Note: the CEN/ISO project was recorded as cancelled in ISO/CS on 2017‑11‑17; the circulated document was a draft and subject to change.

Key Topics

• Scope and designation
  • Applies to hexagon high nuts (style 2) with fine pitch threads M8–M39.
  • Example designation: Hexagon high nut ISO 8674 – M16 × 1.5 – 10.
• Dimensions and preferred threads
  • Preferred thread table includes common fine pitches (e.g. M8×1, M10×1.25, M12×1.5, M16×1.5, M20×2, M24×2, M30×2, M36×3). Non‑preferred sizes are also listed.
• Material and mechanical properties
  • Steel and stainless‑steel options referenced; mechanical properties specified by ISO 898‑2 (steel) and ISO 3506‑2 (stainless steel).
  • Steel nuts may be quenched and tempered in accordance with ISO 898‑2; stainless options include A2‑50, A2‑70, A4‑70, A4‑80 (as referenced).
• Tolerances and threads
  • Thread tolerance class 6H and references to ISO 262, ISO 724 and ISO 965‑2 for thread geometry and limits.
  • Product grades A and B and tolerance guidance per ISO 4759‑1.
• Surface finish and inspection
  • Coatings and passivation requirements referenced (ISO 4042, ISO 10683, ISO 16048).
  • Surface discontinuity limits and acceptance inspection per ISO 6157‑2 and ISO 3269.

Applications

• Intended for fastener manufacturers, design and mechanical engineers, procurement specialists and quality inspectors who specify or produce fine‑pitch hexagon high nuts for machinery, precision assemblies and applications requiring fine thread engagement.
• Useful when selecting nut dimensions, material grades, mechanical property requirements, coatings and inspection criteria for assemblies where fine pitch metric threads are specified.

Related Standards

• ISO 225 (dimensions symbols), ISO 262 / ISO 724 / ISO 965‑2 (metric threads), ISO 898‑2 (mechanical properties - nuts), ISO 3506‑2 (stainless steel), ISO 4759‑1 (tolerances), ISO 4042 / ISO 10683 / ISO 16048 (coatings & passivation), ISO 6157‑2, ISO 3269, ISO/TR 16224 (nut design).

Keywords: hexagon high nuts, fine pitch thread, ISO 8674, product grades A and B, metric threads, fasteners standard, nut dimensions, mechanical properties, stainless steel nuts.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2016
Šestrobe visoke matice (tip 2) z drobnim metrskim navojem - Razreda izdelave A in
B (ISO/DIS 8674:2016)
Hexagon high nuts (style 2), with fine pitch thread - Product grades A and B (ISO/DIS
8674:2016)
Écrous hexagonaux hauts (style 2), à pas fin - Grades A et B (ISO/DIS 8674:2016)
Ta slovenski standard je istoveten z: prEN ISO 8674
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 8674
ISO/TC 2/SC 12 Secretariat: DIN
Voting begins on: Voting terminates on:
2016-03-31 2016-06-29
Hexagon high nuts (style 2), with fine pitch thread —
Product grades A and B
Écrous hexagonaux hauts (style 2) 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 8674:2016(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 8674:2016(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
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ii © ISO 2016 – All rights reserved

ISO/DIS 8674:2016(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
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the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
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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 8674:2012).
This standard differs from ISO 8674:2012 as follows:
— the Scope has been updated;
— M10x1,25 and M20x2 have been moved to the preferred threads table;
— non-preferred threads have been completed;
— for steel nuts, quenching and tempering is specified in accordance with ISO 898-2 as mandatory or
optional;
— for steel nuts, the property class 8 has been extended to the whole diameter range;
— the reference to ISO/TR 16224 for nut design has been added;
— stainless steel nuts have been added.
ISO/DIS 8674:2016(E)
Hexagon high nuts (style 2), with fine pitch thread — Product
grades A and B
1 Scope
This International Standard specifies the characteristics of hexagon high nuts (style 2) with fine pitch
thread, with nominal diameter from 8 mm through 39 mm, with product grade A for nominal di
...