EN ISO 10513:2025

Fasteners - Prevailing torque hexagon nuts - High nuts (all metal), with fine pitch thread (ISO 10513:2025)

This document specifies the characteristics of prevailing torque (all metal) hexagon high nuts, in steel and stainless steel, with metric fine pitch thread 8 mm to 39 mm, and with product grades A and B.
NOTE            These nuts are designed with an overall height hmin = mmin (as specified in ISO 898-2 and ISO 8674 for style 2) plus the prevailing torque feature. hmax has been established in function of hmin; therefore, the tolerance (hmax – hmin) does not follow the ISO code system for tolerances (IT system). The wrenching height mw,min corresponds to the values specified for style 1.
If in certain cases other specifications are requested, property classes and stainless steel grades can be selected from ISO 898-2 or ISO 3506-2.

Verbindungselemente - Sechskantmuttern mit Klemmteil - Hohe Muttern (Ganzmetallmuttern), mit Feingewinde (ISO 10513:2025)

Dieses Dokument legt die Eigenschaften von hohen Sechskantmuttern mit Klemmteil (Ganzmetallmuttern) aus Stahl und nichtrostendem Stahl mit metrischen Feingewinden von 8 mm bis 39 mm, und in Produktklassen A und B fest.
ANMERKUNG   Diese Muttern sind mit einer Gesamthöhe von hmin = mmin (wie in ISO 898 2 und ISO 8674 für den Typ 2 festgelegt) plus Klemmteil gestaltet. hmax wurde als Funktion von hmin festgelegt, daher entspricht die Toleranz (hmax − hmin) nicht dem ISO-Code-System für Toleranzen (IT-System). Die Verrenkungshöhe mw,min entspricht den für Typ 1 angegebenen Werten.
Falls in bestimmten Fällen andere Festlegungen benötigt werden, können Festigkeitsklassen und Stahlsorten nichtrostender Stähle ISO 898 2 oder ISO 3506 2 entnommen werden.

Fixations - Écrous hexagonaux autofreinés - Écrous hauts (tout métal), à pas fin (ISO 10513:2025)

Le présent document spécifie les caractéristiques des écrous hauts hexagonaux autofreinés (tout métal), en acier et en acier inoxydable, à filetage métrique à pas fin de 8 mm à 39 mm, et de grades A et B.
NOTE            Ces écrous sont conçus avec une hauteur totale hmin = mmin (tel que spécifié dans l'ISO 898-2 et l'ISO 8674 pour le style 2) plus le dispositif d’autofreinage. Les valeurs de hmax ont été calculées en fonction de hmin, de ce fait la tolérance (hmax – hmin) ne s’intègre pas dans le système de codification ISO pour les tolérances (IT system). La hauteur de prise de clé mw,min correspond aux valeurs spécifiées pour le style 1.
Si dans certains cas d’autres spécifications sont requises, les classes de qualité et les grades d’acier inoxydable peuvent être choisis dans l’ISO 898-2 ou l’ISO 3506-2.

Vezni elementi - Šestrobe zaščitne matice - Visoke matice (vse kovine) z drobnim navojem (ISO 10513:2025)

Ta dokument določa značilnosti visokih šestrobih matic s samozavorno funkcijo (vse kovine) iz jekla in nerjavnega jekla, z drobnim metrskim navojem velikosti od 8 mm do 39 mm ter razredoma izdelave A in B. OPOMBA:            Te matice so zasnovane s skupno višino hmin = mmin (kot je določeno v standardih ISO 898-2 in ISO 8674 za tip 2) in s samozavorno funkcijo. Vrednost hmax je določena glede na vrednost hmin; zato toleranca (hmax – hmin) ni skladna s sistemom kod ISO za tolerance (sistem IT). Višina dela matice za prijem ključa (mw,min) ustreza vrednostim, določenim za tip 1. Če se v določenih primerih zahtevajo druge specifikacije, je razrede lastnosti in vrste nerjavnega jekla mogoče izbrati v skladu s standardom ISO 898-2 ali ISO 3506-2.

General Information

• Status: Published
• Publication Date: 24-Jun-2025
• 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: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 25-Jun-2025
• Completion Date: 25-Jun-2025
• Ref Project: SIST EN ISO 10513:2025 - Fasteners - Prevailing torque hexagon nuts - High nuts (all metal), with fine pitch thread (ISO 10513:2025)

Relations

• Replaces: EN ISO 10513:2012 - Prevailing torque type all-metal hexagon high nuts with metric fine pitch thread - Property classes 8, 10 and 12 (ISO 10513:2012)
• Effective Date: 19-Jan-2023

Overview

EN ISO 10513:2025 - Fasteners: Prevailing torque hexagon high nuts (all-metal), with fine pitch thread - defines the characteristics, dimensions and requirements for prevailing-torque (all-metal) hexagon high nuts in steel and stainless steel. It covers metric fine-pitch threads from 8 mm to 39 mm, and establishes product grades A and B for different diameter ranges. The standard clarifies design principles (height, wrenching height) and adds marking and labelling requirements.

Key topics and technical requirements

• Scope and geometry
  • Applies to high hexagon nuts with an integrated prevailing-torque feature (shape left to manufacturer within hexagon envelope).
  • Dimension tables for sizes 8–16 mm (product grade A) and 18–39 mm (product grade B) are provided (see Tables 1 & 2).
  • Notes on height: overall height hmin = mmin (per ISO 898‑2 / ISO 8674 style 2) plus prevailing-torque feature; hmax is defined relative to hmin so the h tolerance doesn’t follow the ISO IT system. Wrenching height corresponds to style 1 values.
• Materials and mechanical properties
  • Steel and stainless steel options are specified. Property classes and quenching/tempering for steel are referenced to ISO 898‑2.
  • Common stainless grades noted (A2, A4, D4, D6); stainless fastener properties referenced to ISO 3506‑2.
• Threads and tolerances
  • Metric fine-pitch threads with tolerance class 6H (6G may be specified when coating requires it).
  • Thread dimensions and pitches follow ISO 965‑1 and ISO screw-thread conventions.
• Functional & acceptance requirements
  • Functional prevailing-torque performance generally referenced to ISO 2320 for steel; for stainless steel, prevailing-torque test methods may be nationally specified and should be agreed between purchaser and supplier.
  • Product grades, tolerances and surface discontinuity limits reference ISO 4759‑1, ISO 6157‑2, and ISO 3269 for acceptance inspection.
• Surface condition & coatings
  • As-processed (clean/bright), electroplated coatings (ISO 4042), non‑electrolytic zinc flake (ISO 10683) and other finishes are covered or to be agreed.

Applications and who uses this standard

• Engineers and designers specifying self-locking high hex nuts for machinery, automotive, railway, wind energy, and heavy equipment.
• Fastener manufacturers and quality assurance teams producing and inspecting prevailing-torque, fine-pitch nuts.
• Procurement professionals and technical buyers who need standardized product grades, marking and interchangeability.
• Test labs and certification bodies performing acceptance inspection and functional testing.

Related standards (for cross-reference)

• ISO 898‑2 (mechanical properties - nuts)
• ISO 3506‑2 (stainless steel nuts)
• ISO 2320 (prevailing-torque nuts functional properties)
• ISO 965‑1 (metric thread tolerances)
• ISO 4759‑1, ISO 6157‑2, ISO 3269 (tolerances, surface discontinuities, acceptance)

Keywords: EN ISO 10513:2025, ISO 10513, prevailing torque hexagon nuts, all-metal high nuts, fine pitch thread, metric fine-pitch, fasteners standard, product grade A, product grade B.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2025
Nadomešča:
SIST EN ISO 10513:2013
Vezni elementi - Šestrobe zaščitne matice - Visoke matice (vse kovine) z drobnim
navojem (ISO 10513:2025)
Fasteners - Prevailing torque hexagon nuts - High nuts (all metal), with fine pitch thread
(ISO 10513:2025)
Verbindungselemente - Sechskantmuttern mit Klemmteil - Hohe Muttern
(Ganzmetallmuttern), mit Feingewinde (ISO 10513:2025)
Fixations - Écrous hexagonaux autofreinés - Écrous hauts (tout métal), à pas fin (ISO
10513:2025)
Ta slovenski standard je istoveten z: EN ISO 10513:2025
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.

EN ISO 10513
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2025
EUROPÄISCHE NORM
ICS 21.060.20 Supersedes EN ISO 10513:2012
English Version
Fasteners - Prevailing torque hexagon nuts - High nuts (all
metal), with fine pitch thread (ISO 10513:2025)
Fixations - Écrous hexagonaux autofreinés - Écrous Verbindungselemente - Sechskantmuttern mit
hauts (tout métal), à pas fin (ISO 10513:2025) Klemmteil - Hohe Muttern (Ganzmetallmuttern), mit
Feingewinde (ISO 10513:2025)
This European Standard was approved by CEN on 21 June 2025.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10513:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 10513:2025) 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
BSI.
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 2025, and conflicting national standards
shall be withdrawn at the latest by December 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 10513:2012.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 10513:2025 has been approved by CEN as EN ISO 10513:2025 without any modification.

International
Standard
ISO 10513
Third edition
Fasteners — Prevailing torque
2025-06
hexagon nuts — High nuts (all
metal), with fine pitch thread
Fixations — Écrous hexagonaux autofreinés — Écrous hauts
(tout métal), à pas fin
Reference number
ISO 10513:2025(en) © ISO 2025
ISO 10513:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 10513:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 2
5 Requirements and reference International Standards . 4
6 Marking and labelling . 5
6.1 Marking on product . .5
6.2 Labelling on package .5
7 Designation . 5
Bibliography . 6

iii
ISO 10513:2025(en)
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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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
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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)
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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.
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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 12, Fasteners
with metric internal 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 third edi
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