SIST ISO 272:2000
(Main)Fasteners -- Hexagon products -- Widths across flats
Fasteners -- Hexagon products -- Widths across flats
Specifies the widths to be used in the respective product standards; it sets out a logical ratio between underhead (or nut) bearing area and the tensile stress area of the screw thread.
Éléments de fixation -- Produits hexagonaux -- Dimensions des surplats
Vezni elementi iz šesterorobnih polizdelkov - Zevi ključev
General Information
- Status
- Published
- Publication Date
- 31-Mar-1996
- Technical Committee
- ISEL - Mechanical elements
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Jan-2000
- Due Date
- 01-Jan-2000
- Completion Date
- 01-Jan-2000
Overview
SIST ISO 272:2000 is an international standard developed by the International Organization for Standardization (ISO) that specifies the widths across flats for hexagon fastener products. This includes hexagon bolts, screws with hexagonal heads, hex nuts, and hex flange nuts. The standard ensures a logical ratio between the underhead (or nut) bearing surface area and the tensile stress area of the screw thread, which is essential for maintaining appropriate compression rates and securing mechanical joints efficiently.
The second edition of ISO 272 was published in January 1982, replacing the 1979 edition, and incorporates improvements based on international technical committees' feedback. It is part of ISO’s technical committee ISO/TC 2, which focuses on fastener elements.
Key Topics
- Widths Across Flats: Defines standardized dimensions of the flat surfaces on hexagon fasteners to ensure compatibility and interchangeability.
- Bearing Surface to Tensile Area Ratio: Establishes a technical design principle correlating the bearing area under the head or nut to the tensile stress area of the fastener’s thread. This ratio optimizes force distribution during tightening.
- Hexagon Product Series: Covers normal, wide, and flange hexagon fasteners, detailing dimension progressions that support industrial design rationality.
- Dimension Tables: Provides metric measurements for widths across flats and corresponding thread sizes to guide manufacturers and designers.
- International Consensus: Reflects widespread acceptance among numerous countries with some technical reservations by specific national committees, demonstrating balanced global applicability.
Applications
SIST ISO 272:2000 is fundamental in industries and applications requiring reliable mechanical fastening solutions with hexagon-shaped products:
- Mechanical Engineering: Ensures precise dimensions for assembly and maintenance of machinery and mechanical devices.
- Automotive Industry: Standardizes fasteners used in vehicle manufacturing to guarantee proper fit and load distribution.
- Construction and Infrastructure: Applies to structural bolts and nuts in buildings, bridges, and metal frameworks.
- Manufacturing & Fabrication: Provides design criteria for standardized fastener production, enabling interoperability and quality control.
- Maintenance and Repair: Facilitates selection of correct replacement fasteners based on standardized widths, improving efficiency and safety.
By following ISO 272, organizations benefit from reduced complexity in fastener selection, improved joint reliability, and conformity to recognized international quality requirements.
Related Standards
To complement ISO 272, various related standards provide further guidance on fastener specifications and performance:
- ISO 898 – Mechanical properties of fasteners such as tensile strength and hardness.
- ISO 4014 / ISO 4017 – Specifications for hexagon head bolts with coarse and fine threads.
- ISO 4032 – Regular hexagon nuts, style 1.
- ISO 4161 – Hexagon bolts with flange.
- ISO 4762 – Hexagon socket head cap screws.
- ISO 8992 – Fasteners - General requirements.
These standards collectively ensure that hexagon fasteners meet quality, dimensional, and mechanical requirements critical to global manufacturing and assembly practices.
Keywords: ISO 272, hexagon fasteners, widths across flats, fastener dimensions, bolt standards, nut dimensions, tensile stress area, bearing surface, mechanical fasteners standard, ISO fastener standards, hex bolt specifications.
ISO 272:1982 - Fasteners -- Hexagon products -- Widths across flats
ISO 272:1982 - Éléments de fixation -- Produits hexagonaux -- Dimensions des surplats
ISO 272:1982 - Éléments de fixation -- Produits hexagonaux -- Dimensions des surplats
ISO 272:1982 - Fasteners — Hexagon products — Widths across flats Released:23. 12. 2025
Frequently Asked Questions
SIST ISO 272:2000 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fasteners -- Hexagon products -- Widths across flats". This standard covers: Specifies the widths to be used in the respective product standards; it sets out a logical ratio between underhead (or nut) bearing area and the tensile stress area of the screw thread.
Specifies the widths to be used in the respective product standards; it sets out a logical ratio between underhead (or nut) bearing area and the tensile stress area of the screw thread.
SIST ISO 272:2000 is classified under the following ICS (International Classification for Standards) categories: 21.060.01 - Fasteners in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST ISO 272:2000 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
SIST ISO 272:
01-DSULO-
9H]QLHOHPHQWLL]ãHVWHURUREQLKSROL]GHONRY=HYLNOMXþHY
Fasteners -- Hexagon products -- Widths across flats
Éléments de fixation -- Produits hexagonaux -- Dimensions des surplats
Ta slovenski standard je istoveten z: ISO 272:1982
ICS:
21.060.01 Vezni elementi na splošno Fasteners in general
SIST ISO 272: en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
SIST ISO 272:1996
SIST ISO 272:1996
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATlON.ME>ICPYHAPOflHAR OPTAHM3AUMR l-l0 CTAH&WTM3A~MM@ORGANlSATlON INTERNATIONALE DE NORMALISATION
- Hexagon products - Widths across flats
Fasteners
&nents de fixation - Prod&s hexagonaux - Dimensions des surplats
Second edition - 1982-01-15
UDC 621.882.1 Ref. No. IS0 2724982 (E)
fasteners, screws, hexagonal head screws, bolts, nuts (fasteners), hexagonal nuts, width across flats, dimensions.
Descriptors :
Price based on 3 pages
SIST ISO 272:1996
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards institutes (IS0 member bodies). The work of developing Inter-
national Standards is carried out through IS0 technical committees. Every member
body interested in a subject for which a technical committee has been set up 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council.
International Standard IS0 272 was developed by Technical Committee ISO/TC 2,
Fasteners. The first edition (IS0 272-1979) had been approved by the member bodies
of the following countries :
Australia Ireland Romania
Belgium Italy South Africa, Rep. of
Canada Korea, Dem. P. Rep. of Spain
Korea, Rep. of Sweden
Czechoslovakia
Denmark Mexico Switzerland
Finland Netherlands Turkey
New Zealand United Kingdom
Germany, F. R.
Norway USA
Hungary
India Poland Yugoslavia
The member bodies of the following countries expressed disapproval of the document
on technical grounds :
France
USSR
This second edition, which cancels and replaces IS0 2724979, incorporates draft
Addendum 1, which was circulated to the member bodies in March 1980 and has been
approved by the member bodies of the following countries :
Australia India Poland
Austria Ireland Romania
Belgium
Italy South Africa, Rep. of
Czechoslovakia Japan Spain
Egypt, Arab Rep. of
Korea, Dem. P. Rep. of Sweden
Finland Switzerland
Korea, Rep. of
France Netherlands United Kingdom
Germany, F. R. New Zealand USA
Hungary Norway
The member bodies of the following countries expressed disapproval of the document
...
SLOVENSKI STANDARD
01-januar-2000
9H]QLHOHPHQWLL]ãHVWHURUREQLKSROL]GHONRY=HYLNOMXþHY
Fasteners -- Hexagon products -- Widths across flats
Éléments de fixation -- Produits hexagonaux -- Dimensions des surplats
Ta slovenski standard je istoveten z: ISO 272:1982
ICS:
21.060.01 Vezni elementi na splošno Fasteners in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATlON.ME>ICPYHAPOflHAR OPTAHM3AUMR l-l0 CTAH&WTM3A~MM@ORGANlSATlON INTERNATIONALE DE NORMALISATION
- Hexagon products - Widths across flats
Fasteners
&nents de fixation - Prod&s hexagonaux - Dimensions des surplats
Second edition - 1982-01-15
UDC 621.882.1 Ref. No. IS0 2724982 (E)
fasteners, screws, hexagonal head screws, bolts, nuts (fasteners), hexagonal nuts, width across flats, dimensions.
Descriptors :
Price based on 3 pages
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards institutes (IS0 member bodies). The work of developing Inter-
national Standards is carried out through IS0 technical committees. Every member
body interested in a subject for which a technical committee has been set up 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council.
International Standard IS0 272 was developed by Technical Committee ISO/TC 2,
Fasteners. The first edition (IS0 272-1979) had been approved by the member bodies
of the following countries :
Australia Ireland Romania
Belgium Italy South Africa, Rep. of
Canada Korea, Dem. P. Rep. of Spain
Korea, Rep. of Sweden
Czechoslovakia
Denmark Mexico Switzerland
Finland Netherlands Turkey
New Zealand United Kingdom
Germany, F. R.
Norway USA
Hungary
India Poland Yugoslavia
The member bodies of the following countries expressed disapproval of the document
on technical grounds :
France
USSR
This second edition, which cancels and replaces IS0 2724979, incorporates draft
Addendum 1, which was circulated to the member bodies in March 1980 and has been
approved by the member bodies of the following countries :
Australia India Poland
Austria Ireland Romania
Belgium
Italy South Africa, Rep. of
Czechoslovakia Japan Spain
Egypt, Arab Rep. of
Korea, Dem. P. Rep. of Sweden
Finland Switzerland
Korea, Rep. of
France Netherlands United Kingdom
Germany, F. R. New Zealand USA
Hungary Norway
The member bodies of the following countries expressed disapproval of the document
on technical
...
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATlON.ME>ICPYHAPOflHAR OPTAHM3AUMR l-l0 CTAH&WTM3A~MM@ORGANlSATlON INTERNATIONALE DE NORMALISATION
- Hexagon products - Widths across flats
Fasteners
&nents de fixation - Prod&s hexagonaux - Dimensions des surplats
Second edition - 1982-01-15
UDC 621.882.1 Ref. No. IS0 2724982 (E)
fasteners, screws, hexagonal head screws, bolts, nuts (fasteners), hexagonal nuts, width across flats, dimensions.
Descriptors :
Price based on 3 pages
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards institutes (IS0 member bodies). The work of developing Inter-
national Standards is carried out through IS0 technical committees. Every member
body interested in a subject for which a technical committee has been set up 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council.
International Standard IS0 272 was developed by Technical Committee ISO/TC 2,
Fasteners. The first edition (IS0 272-1979) had been approved by the member bodies
of the following countries :
Australia Ireland Romania
Belgium Italy South Africa, Rep. of
Canada Korea, Dem. P. Rep. of Spain
Korea, Rep. of Sweden
Czechoslovakia
Denmark Mexico Switzerland
Finland Netherlands Turkey
New Zealand United Kingdom
Germany, F. R.
Norway USA
Hungary
India Poland Yugoslavia
The member bodies of the following countries expressed disapproval of the document
on technical grounds :
France
USSR
This second edition, which cancels and replaces IS0 2724979, incorporates draft
Addendum 1, which was circulated to the member bodies in March 1980 and has been
approved by the member bodies of the following countries :
Australia India Poland
Austria Ireland Romania
Belgium
Italy South Africa, Rep. of
Czechoslovakia Japan Spain
Egypt, Arab Rep. of
Korea, Dem. P. Rep. of Sweden
Finland Switzerland
Korea, Rep. of
France Netherlands United Kingdom
Germany, F. R. New Zealand USA
Hungary Norway
The member bodies of the following countries expressed disapproval of the document
on technical grounds :
Canada
Denmark
USSR
0 International Organization for Standardization, 1982
Printed in Switzerland
IS0 2724982 (E)
INTERNATIONAL STANDARD
Fasteners - Hexagon products - Widths across flats
1 Scope and field of application
This International Standard specifies widths across flats for hexagon products, for example hexagon head bolts and screws, hexagon
nuts
...
Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDlZATIONWlE~YHAPO~HAR OPrAHM3AUMR ll0 CTAHCJAPTbl3A~tWl.ORGANlSATlON INTERNATIONALE DE NORMALISATION
elbments de fixation - Produits hexagonaux -
Dimensions des surplats
Fasteners - Hexagon products - Widths across flats
Deuxi6me 6dition - 1982-01-15
CDU 621.882.1
Mf. no : IS0 2724982 (F)
iz
-
Descripteurs : Mment de fixation, vis, vis 8 tQte hexagonale, boulon, 6crou,
6crou hexagonal, surplat, dimension.
Prix bas6 sur 3 pages
Avant-propos
L’ISO (Organisation internationale de normalisation) est une federation mondiale
d’organismes nationaux de normalisation (comites membres de I’ISO). L’elaboration
des Normes internationales est confide aux comites techniques de I’ISO. Chaque
comite membre interesse par une etude a le droit de faire pat-tie du comite technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent egalement aux travaux.
Les projets de Normes internationales adopt& par les comites techniques sont soumis
aux comites membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale IS0 272 a et6 elaboree par le comite technique ISO/TC 2,
&ments de fixation. La premiere edition (IS0 272-1979) avait et6 approuvee par les
comites membres des pays suivants :
Finlande Pologne
Afrique du Sud, Rep. d’
Allemagne, R. F. Hongrie Roumanie
Australie lnde Royaume-Uni
Suede
Belgique lrlande
Suisse
Canada ltalie
Mexique Tchecoslovaquie
Co&e, Rep. dem. p. de
Co&e, Rep. de Norvege Turquie
Danemark Nouvelle-Zelande USA
Yougoslavie
Espagne Pays- Bas
Les comites membres des suivants l’avaient desapprouvee pour des raisons
Pays
techniques :
France
URSS
Cette deuxieme edition, qui annule et remplace I’ISO 2724979, incorpore le projet
d’Additif 1, qui a 6te soumis aux comites membres en mars 1980 et qui a et6 approuve
par les comites membres des pays suivants :
Pays- Bas
Afrique du Sud, Rep. d’ Finlande
France Pologne
Allemagne, R. F.
Hongrie Roumanie
Australie
Autriche lnde Royaume-Uni
Belgique lrlande Suede
Coree, Rep. de ltalie Suisse
Tchecoslovaquie
Co&e, Rep. dem. p. de Japon
Egypte, Rep. arabe d’ USA
Norvege
Espagne Nouvelle-Zelande
Les comites membres des pays suivants I’ont desapprouve pour des raisons
techniques :
Canada
Danemark
URSS
0 Organisation internationale de normalisation, 1982
Imprim en Suisse
IS0 2724982 (F)
NORME INTERNATIONALE
- Produits hexagonaux -
Elbments de fixation
Dimensions des surplats
1 Objet et domaine d’application
La presente Norme internationale fixe les dimensions des surplats pour produits hexagonaux, par exemple b
...
Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDlZATIONWlE~YHAPO~HAR OPrAHM3AUMR ll0 CTAHCJAPTbl3A~tWl.ORGANlSATlON INTERNATIONALE DE NORMALISATION
elbments de fixation - Produits hexagonaux -
Dimensions des surplats
Fasteners - Hexagon products - Widths across flats
Deuxi6me 6dition - 1982-01-15
CDU 621.882.1
Mf. no : IS0 2724982 (F)
iz
-
Descripteurs : Mment de fixation, vis, vis 8 tQte hexagonale, boulon, 6crou,
6crou hexagonal, surplat, dimension.
Prix bas6 sur 3 pages
Avant-propos
L’ISO (Organisation internationale de normalisation) est une federation mondiale
d’organismes nationaux de normalisation (comites membres de I’ISO). L’elaboration
des Normes internationales est confide aux comites techniques de I’ISO. Chaque
comite membre interesse par une etude a le droit de faire pat-tie du comite technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent egalement aux travaux.
Les projets de Normes internationales adopt& par les comites techniques sont soumis
aux comites membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale IS0 272 a et6 elaboree par le comite technique ISO/TC 2,
&ments de fixation. La premiere edition (IS0 272-1979) avait et6 approuvee par les
comites membres des pays suivants :
Finlande Pologne
Afrique du Sud, Rep. d’
Allemagne, R. F. Hongrie Roumanie
Australie lnde Royaume-Uni
Suede
Belgique lrlande
Suisse
Canada ltalie
Mexique Tchecoslovaquie
Co&e, Rep. dem. p. de
Co&e, Rep. de Norvege Turquie
Danemark Nouvelle-Zelande USA
Yougoslavie
Espagne Pays- Bas
Les comites membres des suivants l’avaient desapprouvee pour des raisons
Pays
techniques :
France
URSS
Cette deuxieme edition, qui annule et remplace I’ISO 2724979, incorpore le projet
d’Additif 1, qui a 6te soumis aux comites membres en mars 1980 et qui a et6 approuve
par les comites membres des pays suivants :
Pays- Bas
Afrique du Sud, Rep. d’ Finlande
France Pologne
Allemagne, R. F.
Hongrie Roumanie
Australie
Autriche lnde Royaume-Uni
Belgique lrlande Suede
Coree, Rep. de ltalie Suisse
Tchecoslovaquie
Co&e, Rep. dem. p. de Japon
Egypte, Rep. arabe d’ USA
Norvege
Espagne Nouvelle-Zelande
Les comites membres des pays suivants I’ont desapprouve pour des raisons
techniques :
Canada
Danemark
URSS
0 Organisation internationale de normalisation, 1982
Imprim en Suisse
IS0 2724982 (F)
NORME INTERNATIONALE
- Produits hexagonaux -
Elbments de fixation
Dimensions des surplats
1 Objet et domaine d’application
La presente Norme internationale fixe les dimensions des surplats pour produits hexagonaux, par exemple b
...
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ISO 272
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Fasteners — Hexagon products — Widths across flats
عجرملاا م�قر International Organization for ©
ISO 272:1982(en) Standardization 1982
ISO 272:1982(en)
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International Organization for Standardization 1982 ©
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Tel. + 41 22 749 01 11
E-mail copyright@iso.org
Website www.iso.org
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ا�تنا�نسا نا�نا�تاا ا�تكاقولس �ك�تسي
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ذ�يوساا ا�يروك مضم
اسنمق امس�يوس هذنلنق
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ا�تنالا�ا هذحتلاا ةكلللاا اذناوه
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ا�يراعنه ة�تك�يمم�الا هذحتلاا تا�يالواا هذنارو�تن
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جخ�يومناا
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ة�تن�ق �تا�نس�ال ةقصاولاا ىلع ةق�قاولاا مذع�ن اويوص ة�تااتاا لوذلا ن�تلتللاا ءاضع�الا
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اذنك
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�كرالنذاا
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�ىت�ت�قوساا ذاحيالا
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© ISO 1982 – All rights reserved
د
ISO 272:1982(en)
© ISO 1982 – All rights reserv
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