EN ISO 4759-3:2016

Tolerances for fasteners - Part 3: Washers for bolts, screws and nuts - Product grades A, C and F (ISO 4759-3:2016)

ISO 4759-3:2016 specifies tolerances for flat washers of product grades A, C and F with nominal diameters of 1 mm to 150 mm inclusive, designed to be used in bolted joints in combination with bolts, screws, studs and nuts.
This part of ISO 4759 may be applied to non-flat washers however it does not include all the tolerances related to these washers.
It applies to non-captive and captive washers, and to standard and non-standard washers.
It does not apply to dynamic disc springs.
Washers of product grades F and A are intended to be used with bolts, screws, studs and nuts of product grades A and B; washers of product grade C are intended to be used with bolts, screws, studs and nuts of product grade C.
NOTE          The product grade refers to a specific tolerance range related to dimensional and geometrical characteristics (product grade F for fine tolerances, product grade A for precise tolerances, product grade C for large tolerances).
Annex A presents tolerances taken from ISO 286‑1 and ISO 286‑2.

Toleranzen für Verbindungselemente - Teil 3: Scheiben für Schrauben und Muttern - Produktklassen A, C und F (ISO 4759-3:2016)

Dieser Teil von ISO 4759 legt Toleranzen für flache Scheiben der Produktklassen A, C und F mit Nenn-durchmessern von 1 mm bis einschließlich 150 mm fest, die für die Verwendung in Schraubverbindungen in Kombination mit Schrauben und Muttern vorgesehen sind.
Diese Norm darf auch auf nicht-flache Scheiben angewendet werden, für die jedoch nicht alle Toleranzen erfasst werden.
Sie gilt sowohl für verlierbare als auch für unverlierbare Scheiben sowie für genormte und für nicht genormte Scheiben.
Sie gilt nicht für dynamisch beanspruchte Tellerfedern.
Scheiben der Produktklassen F und A sind für die Anwendung mit Schrauben und Muttern der Produktklassen A und B vorgesehen; Scheiben der Produktklasse C sind für die Anwendung mit Schrauben und Muttern der Produktklasse C vorgesehen.
ANMERKUNG   Die Produktklasse bezieht sich auf einen spezifischen Toleranzbereich bezogen auf maßliche und geo¬metrische Merkmale.
Der informative Anhang A enthält Toleranzen aus ISO 286 1 und ISO 286 2.

Tolérances pour fixations - Partie 3: Rondelles pour vis et écrous - Grades A, C et F (ISO 4759-3:2016)

ISO 4759-3:2016 spécifie les tolérances pour les rondelles de forme plane de grades A, C et F de diamètre nominal de 1 mm à 150 mm inclus, conçues pour être utilisées dans des assemblages boulonnés en combinaison avec des vis, goujons, tiges filetées et écrous.
ISO 4759-3:2016 peut être appliquée aux rondelles de forme non plane cependant, elle ne comporte pas toutes les tolérances liées à ces rondelles.
Elle s'applique aux rondelles libres et aux rondelles imperdables, normalisées et non normalisées.
Elle ne s'applique pas aux rondelles ressorts dynamiques (dites « Belleville »).
Les rondelles de grades F et A sont destinées à être utilisées avec des vis, goujons, tiges filetées et écrous de grades A et B, les rondelles de grade  C sont destinées à être utilisées avec des vis, goujons, tiges filetées et écrous de grade C.
NOTE          Le grade correspond à une gamme de tolérances spécifiques relatives aux caractéristiques dimensionnelles et géométriques (grade F pour les tolérances fines, grade A pour les tolérances précises, grade C pour les tolérances larges).
L'Annexe A présente les tolérances issues de l'ISO 286‑1 et l'ISO 286‑2.

Tolerance za mehanske vezne elemente - 3. del: Ravne podložke za vijake in matice - Razredi izdelave A, C in F (ISO 4759-3:2016)

Ta del standarda ISO 4759 določa tolerance za ravne podložke razredov izdelave A, C in F z nominalnim
premerom od 1 mm do vključno 150 mm, ki so zasnovane za uporabo v vijačnih zvezah skupaj z vijaki
in maticami.
Ta del standarda ISO 4759 se lahko uporablja za neravne podložke, vendar ne vključuje vseh toleranc, povezanih s takšnimi podložkami.
Uporablja se za nerobljene in robljene podložke ter standardne in nestandardne podložke.
Ne uporablja se za dinamične diskaste vzmeti.
Podložke razredov izdelave F in A so namenjene za uporabo z vijaki in maticami razredov A in B; podložke razreda izdelave C so namenjene za uporabo z vijaki in maticami razreda izdelave C.
OPOMBA: razred izdelave se nanaša na določen tolerančni obseg, povezan z dimenzijskimi in geometrijskimi
značilnostmi (razred izdelave F za ozke tolerance, razred izdelave A za natančne tolerance, razred izdelave C za velike tolerance).
V Dodatku A so predstavljene tolerance iz standardov ISO 286-1 in ISO 286-2.

General Information

• Status: Published
• Publication Date: 28-Jun-2016
• Withdrawal Date: 30-Jan-2017
• ICS: 21.060.30 - Washers, locking elements
• 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: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 29-Jun-2016
• Completion Date: 29-Jun-2016
• Ref Project: SIST EN ISO 4759-3:2016 - Tolerances for fasteners - Part 3: Washers for bolts, screws and nuts - Product grades A, C and F (ISO 4759-3:2016)

Relations

• Replaces: EN ISO 4759-3:2000 - Tolerances for fasteners - Part 3: Plain washers for bolts, screws and nuts - Products grades A and C (ISO 4759-3:2000)
• Effective Date: 26-Mar-2014

Overview

EN ISO 4759-3:2016 - "Tolerances for fasteners - Part 3: Washers for bolts, screws and nuts - Product grades A, C and F (ISO 4759-3:2016)" is a CEN-adopted international standard that defines dimensional, form and position tolerances for flat washers. It covers washers with nominal diameters from 1 mm to 150 mm, applies to non-captive and captive as well as standard and non-standard washers, and is intended for use in bolted joints together with bolts, screws, studs and nuts.

Key topics and technical requirements

• Product grades: Defines three tolerance bands - F (fine), A (precise) and C (coarse/large) - indicating progressively wider tolerance ranges for dimensional and geometric characteristics.
• Dimensions covered: Tolerances for clearance hole(s), outside diameter, thickness, and chamfers (inner and outer). Chamfer orientation options are specified for captive washers.
• Form & position: Requirements and limits for coaxiality (y), flatness/deflection (z) and thickness variation (Δt). Geometric tolerancing follows ISO 1101 and ISO 2692.
• Measurement conditions: Tolerances apply prior to coating; thickness tolerances are measured after removal of burrs.
• Compatibility note: Washers of grades F and A are intended for use with bolts/screws/studs/nuts of product grades A and B; washers of grade C match fasteners of grade C.
• Normative references and annexes: Annex A draws IT tolerance values and limit deviations from ISO 286‑1 and ISO 286‑2 (standard tolerance grades IT11–IT15 etc.).

Example: thickness tolerances are specified by thickness ranges and product grade (e.g., for very thin washers t ≤ 0.5 mm the permitted thickness deviation is on the order of hundredths of a millimetre and increases for thicker parts).

Practical applications and users

Who uses EN ISO 4759-3:2016:

• Fastener and washer manufacturers - to specify production tolerances and QA acceptance criteria.
• Design and mechanical engineers - to select appropriate washer grades to meet joint performance and assembly requirements.
• Quality/inspection engineers - to prepare inspection plans and sampling criteria for dimensional and geometric checks.
• Purchasing and specification writers - to create unambiguous procurement documents for washers used in bolted assemblies.
• Standards committees and test labs - for conformity assessment and harmonized testing.

Benefits:

• Ensures interchangeability and reliable fit in bolted joints.
• Reduces assembly issues (misfits, uneven bearing, preload loss) by specifying hole, diameter, thickness and form tolerances.
• Improves communication between suppliers and users using standardized product grades.

Related standards

• ISO 4759-1 (bolts, screws, studs and nuts - product grades A, B and C)
• ISO 1101 (geometrical tolerancing)
• ISO 2692 (MMR/LMR requirements)
• ISO 286‑1 / ISO 286‑2 (IT tolerance grades and limit deviations)

Keywords: EN ISO 4759-3:2016, washers tolerances, fastener tolerances, product grades A C F, washers for bolts screws nuts, ISO 4759-3.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2016
1DGRPHãþD
SIST EN ISO 4759-3:2001
Tolerance za mehanske vezne elemente - 3. del: Ravne podložke za vijake in
matice - Razredi izdelave A, C in F (ISO 4759-3:2016)
Tolerances for fasteners - Part 3: Washers for bolts, screws and nuts - Product grades A,
C and F (ISO 4759-3:2016)
Toleranzen für Verbindungselemente - Teil 3: Scheiben für Schrauben und Muttern -
Produktklassen A, C und F (ISO 4759-3:2016)
Tolérances pour fixations - Partie 3: Rondelles pour vis et écrous - Grades A, C et F (ISO
4759-3:2016)
Ta slovenski standard je istoveten z: EN ISO 4759-3:2016
ICS:
17.040.10 Tolerance in ujemi Limits and fits
21.060.30 Podložke, varovalni elementi Washers, locking elements
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4759-3
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2016
EUROPÄISCHE NORM
ICS 21.060.30 Supersedes EN ISO 4759-3:2000
English Version
Tolerances for fasteners - Part 3: Washers for bolts, screws
and nuts - Product grades A, C and F (ISO 4759-3:2016)
Tolérances pour fixations - Partie 3: Rondelles pour vis Toleranzen für Verbindungselemente - Teil 3: Scheiben
et écrous - Grades A, C et F (ISO 4759-3:2016) für Schrauben und Muttern - Produktklassen A, C und F
(ISO 4759-3:2016)
This European Standard was approved by CEN on 19 May 2016.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4759-3:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 4759-3:2016) has been prepared by Technical Committee ISO/TC 2 "Fasteners"
in collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by
DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2016, and conflicting national standards
shall be withdrawn at the latest by December 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 4759-3:2000.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 4759-3:2016 has been approved by CEN as EN ISO 4759-3:2016 without any
modification.
INTERNATIONAL ISO
STANDARD 4759-3
Fourth edition
2016-06-01
Tolerances for fasteners —
Part 3:
Washers for bolts, screws and nuts —
Product grades A, C and F
Tolérances pour fixations —
Partie 3: Rondelles pour vis et écrous — Grades A, C et F
Reference number
ISO 4759-3:2016(E)
©
ISO 2016
ISO 4759-3:2016(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 4759-3:2016(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Symbols . 1
4 Tolerances . 2
Annex A (informative) Tolerances . 8
Bibliography .11
ISO 4759-3:2016(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.
This fourth edition cancels and replaces the third edition (ISO 4759-3:2000), which has been technically
revised.
In comparison to ISO 4759-3:2000, the following changes have been made.
a) the scope has been amended;
b) the normative references have been updated;
c) a new Clause 3 “Symbols and abbreviated terms” has been added;
d) new product grade F has been included (F for Fine tolerances);
e) tolerances for chamfers have been included;
f) in Table A.1 tolerances for standard tolerance grades IT11 and IT14 have been included and IT16
has been deleted;
g) in Tables A.2 and A.3 limit deviations for tolerance classes h13 and H12 respectively have been
included;
h) the bibliography has been updated;
i) this part of ISO 4759 has been editorially revised.
ISO 4759 consists of the following parts, under the general title Tolerances for fasteners:
— Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
— Part 3: Washers for bolts, screws and nuts — Product grades A, C and F
iv © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 4759-3:2016(E)
Tolerances for f
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