ISO 7575:1993

Commercial road vehicles - Flat attachment wheel fixing nuts

Specifies the essential dimensions of hexagon nuts with a flat seat captive washer for 18 mm, 20 mm and 22 mm studs.

Véhicules utilitaires — Écrous de fixation des roues à attache plate

General Information

• Status: Published
• Publication Date: 09-Jun-1993
• ICS: 43.040.50 - Transmissions, suspensions
• Technical Committee: ISO/TC 22/SC 33 - Vehicle dynamics and chassis components
• Drafting Committee: ISO/TC 22/SC 33/WG 5 - Wheels
• Current Stage: 9093 - International Standard confirmed
• Start Date: 23-Apr-2025
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 7575:1984 - Road vehicles - Wheels for commercial vehicles - Flat attachment - Fixing nuts
• Effective Date: 15-Apr-2008

Overview

ISO 7575:1993 is an International Standard developed by ISO Technical Committee ISO/TC 22, Subcommittee SC 19, which focuses on road vehicle wheels. This standard specifies the essential dimensions of hexagon nuts with flat seats and captive washers designed for commercial road vehicles. It applies specifically to wheel fixing nuts used on flat attachment wheels for studs measuring 18 mm, 20 mm, and 22 mm. The standard ensures compatibility and interchangeability in fastening commercial vehicle wheels with flat attachments that center on a central bore as defined in ISO 4107.

By defining precise dimensions and tolerances, ISO 7575:1993 provides manufacturers, engineers, and maintenance professionals with reliable specifications for producing and selecting flat attachment wheel fixing nuts that guarantee fitment, safety, and performance.

Key Topics

• Standard Scope: Essential dimensions of flat seat hexagon nuts with captive washers for commercial vehicle wheel studs of 18 mm, 20 mm, and 22 mm diameters.
• Design Specifications: Includes detailed dimensional parameters such as width across flats, radial width of washer contact surface, overall washer height, and inner and outer washer diameters.
• Interchangeability: Dimensions ensure nuts can be reliably interchanged across commercial vehicle flat attachment wheels conforming to ISO 4107.
• Nut Technology Flexibility: While critical dimensions are standardized, the design of the nut relative to the washer remains manufacturer-dependent, allowing innovation around fastening performance and materials.
• Manufacturing Tolerances: Specifies dimensional tolerances to maintain uniformity in production and facilitate consistent assembly.

Applications

ISO 7575:1993 is crucial for industries involved in the manufacture, assembly, and maintenance of commercial road vehicles’ wheels. Common practical applications include:

• Commercial Vehicle Assembly: Ensures wheel fixing nuts meet dimensional standards to enable proper mounting of flat attachment wheels on trucks, buses, and other heavy vehicles.
• Automotive Component Suppliers: Assists fastener manufacturers in producing hexagon nuts and captive washers that comply with international requirements for commercial vehicles.
• Maintenance and Repair Operations: Provides guidelines to select correct replacement wheel nuts to maintain vehicle safety, proper wheel mounting, and compliance with regulatory standards.
• Quality Control: Enables inspectors to verify dimensions and tolerances during manufacturing and final inspection procedures, promoting consistent product quality.
• Design Engineering: Facilitates automotive designers in specifying wheel fixation components compatible with standardized fasteners for flat attachment wheels.

Related Standards

ISO 7575:1993 is interconnected with other ISO standards related to commercial vehicle wheels and fasteners, including:

• ISO 4107: Road vehicles – Wheels for commercial vehicles – Dimensional characteristics of attachment on hub. This standard defines the dimensional requirements for flat attachment wheels that ISO 7575 wheel fixing nuts are designed to secure.
• ISO 4014 / ISO 4017: General standards for hexagon bolts and screws that may relate to stud specifications for fastening applications.
• ISO 898 series: Mechanical properties of fasteners, often referenced to ensure strength and performance compliance.
• ISO 4759: Tolerances for fasteners, complementary in defining manufacturing and inspection limits.

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Keywords: ISO 7575, flat attachment wheel fixing nuts, commercial road vehicles, hexagon nuts, captive washer, wheel studs, vehicle wheels fasteners, ISO 4107, automotive wheel nuts, commercial vehicle maintenance, fastener standards, wheel fixation nuts dimensions

Standards Content (Sample)

ISO
INTERNATIONAL
STANDARD
Second edition
1993-06-15
Commercial road vehicles - Flat
attachment wheel fixing nuts
- Ecrous de fixa tion des roues a attache pla te
V6 hicules u tilitaires
Reference number
7575:1993(E)
ISO
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. Esch 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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 7575 was prepared by Technical Committee
lSO/lC 22, Road vehicles, Sub-(Zornmittee SC 19, W’heels.
This second edition cancels and replaces the first edition
(ISO 7575:1984). Dimensions for the hexagon flat in figure 1 and table 1
are new.
(8 ISO 1993
All rights reserved. No part of this publication may be reproduced or utilized in any form or
by any means, electronie or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
INTERNATIONAL STANDARD ISO 7575:1993(E)
Commercial road vehicles - Flat attachment wheel
fixing nuts
to investigate the possibility of applying the most re-
1 Scope
cent edition of the Standard indicated below. Mem-
bers of IEC and ISO maintain registers of currently
This International Standard specifies the essential di-
valid International Standards.
mensions of hexagon nuts with a
...

NORME ISO
INTERNATIONALE 7575
Deuxième édition
1993-06-15
Véhicules utilitaires - Écrous de fixation
des roues à attache plate
- Fiat attachmen t wheel fixing nuts
Commercial road vehicles
Avant-propos
L’ISO (Organisation internationale de normalisation) est une féderation
mondiale d’organismes nationaux de normalisation (comités membres de
I’ISO). L’élaboration des Normes internationales est en général confiée aux
comites techniques de I’ISO. Chaque comite membre interessé par une
étude a le droit de faire partie du comite technique crée à cet effet. Les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec I’ISO participent également aux travaux. L’ISO colla-
bore etroitement avec la Commission électrotechnique internationale (CEI)
en ce qui concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptes par les comités techniques
sont soumis aux comites membres pour vote. Leur publication comme
Normes internationales requiert l’approbation de 75 % au moins des co-
mites membres votants.
La Norme internationale ISO 7575 a été élaboree par le comite technique
lSO/TC 22, V6hicules routiers, sous-comite SC 19, Roues.
Cette deuxieme Adition annule et remplace la Premiere edition
(ISO 7575:1984), à laquelle la hauteur de la partie hexagonale a ete ajou-
tee.
43 ISO 1993
Droits de reproduction reserves. Aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie et les microfilms, sans l’accord Acrit de I’editeur.
Organisation internationale de normalisation

NORME INTERNATIONALE
Véhicules utilitaires - Écrous de fixation des roues à
attache plate
sur la présente Norme internationale sont invitees à
1 Domaine d’application
rechercher la possibilité d’appliquer l’edition la plus
récente de la norme indiquée ci-après. Les membres
La présente Norme internationale prescrit les carac-
de la CEI et de I’ISO possédent le registre des Nor-
téristiques dimensionnelles principales des ecrous
mes internationales en vigueur à un moment donne.
hexagonaux à rondelle captive à siège plat pour gou-
jons de 18 mm,
...

I
NORME IS0
I N T ER NAT I O NA LE
Deuxihme edition
1993-06-1 5
Véhicules utilitaires - Écrous de fixation
des roues à attache plate
Commercial road vehicles - Flat attachment wheel fixing nuts
Numero de reference
IS0 7575:1993(F)
IS0 7575:1993(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une federation
mondiale d'organismes nationaux de normalisation (cornites membres de
I'ISO). L'6laboration des Normes internationales est en general confiee aux
comites techniques de I'ISO. Chaque comit6 membre interesse par une
etude a le droit de faire partie du comite technique cr66 B cet effet. Les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec I'ISO participent dgalement aux travaux. L'ISO colla-
bore etroitement avec la Commission dectrotechnique internationale (CEI)
en ce qui concerne la normalisation dectrotechnique.
Les projets de Normes internationales adoptes par les comites techniques
sont soumis aux comites membres pour vote. Leur publication comme
Normes internationales requiert l'approbation de 75 % au moins des co-
mites membres votants.
La Norme internationale IS0 7575 a 6t6 6labor6e par le comit6 technique
ISO/TC 22, Vkhicules routiers, sous-comit6 SC 19, Roues.
Cette deuxikme edition annule et remplace la premiere edition
(IS0 7575:1984), h laquelle la hauteur de la partie hexagonale a et6 ajou-
tee.
O IS0 1993
Droits de reproduction rBservBs. Aucune partie de cette publication ne peut &re reproduite
ni utilisBe sous quelque forme que ce soit et par aucun procBd6, Blectronique ou mbcanique,
y compris la photocopie et les microfilms, sans l'accord &rit de I'Bditeur.
Organisation internationale de normalisation
Case Postale 56 CH-1 21 1 Genbve 20 Suisse
Imprime en Suisse
II
NORME INTERNATIONALE IS0 7575:1993(Fl
Véhicules utilitaires - Écrous de fixation des roues a
attache plate
sur la presente Norme internationale sont invitees &
1 Domaine d'application
rechercher la possibilite d'appliquer 1'6dition la plus
recente de la norme indiquee ci-apres. Les membres
La presente Norme internationale prescrit les carac-
de la CE1 et de I'ISO possedent le registre des Nor-
teristiques d
...