SIST EN ISO 4759-1:2002

Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C (ISO 4759-1:2000)

Migrated from Progress Sheet (TC Comment) (2000-07-10): Wait for ISO-text for PQ or PV. ISO 4759-1 is under revision.

Toleranzen für Verbindungselemente - Teil 1: Schrauben und Muttern - Produktklassen A, B und C (ISO 4759-1:2000)

Diese Internationale Norm legt eine Auswahl von Toleranzen für Schrauben und Muttern mit ISO-Metrischem Gewinde und Produktklassen A, B, und C und für Blechschrauben mit Produktklasse A fest. ANMERKUNG 1: Die Bilder sind Beispiele um die Anwendung der Maße, die mit Toleranzen versehen sind, zu verdeutlichen. Hinsichtlich der bildichen Darstellung wird auf ISO 8015 verwiesen. Die Toleranzen, mit Ausnahme der Toleranzen für Gewinde, wurden aus dem System "Toleranzen und Passungen" nach ISO 286-1 und ISO 286-2 ausgewählt.

Tolérances des éléments de fixation - Partie 1: Vis, goujons et écrous - Grades A, B et C (ISO 4759-1:2000)

La présente partie de l'ISO 4759 spécifie une sélection de tolérances pour les vis, goujons et écrous à filetage métrique ISO et de grades A, B et C ainsi que pour les vis à tôle de grade A.  
NOTE 1: Les grades se référent à l'étendue des tolérances, le grade A étant le plus précis et le grade C le moins précis. Les tolérances, à l'exception des tolérances de filetage, sont sélectionnées d'après le système de tolérances et d'ajustements spécifié dans l'ISO 286-1 et l'ISO 286-2. Les tolérances pour le filetage métrique sont issues de la serie de classes de tolérances spécifiées dans l'ISO 965-3; les tolérances pour les filetages de vis à tôle sont traitées dans l'ISO 1478. Les tolérances de forme et de position sont spécifiées et indiquées conformément à l'ISO 1101, à l'ISO 8015 et à l'ISO  2692. Les tolérances spécifiées dans la présente partie de l'ISO 4759 s'appliquent, sauf spécification contraire, aux éléments de fixation avant revêtement. Voir également l'ISO 4042. Des écarts par rapport aux tolérances spécifiées dans la présente partie de l'ISO 4759 ne sont autorisés dans les normes de produits que pour des raisons techniques valables. Lorsqu'il existe une différence entre les prescriptions de tolérance de la présente partie de l'ISO 4759 et de la norme de produit, la norme de produit est prioritaire. Il est recommandé d'utiliser également ces tolérances pour les éléments de fixation non normalisés. Les dimensions et tolérances données dans la présente partie de l'ISO 4759 sont en millimètres.

Tolerance za vezne elemente - 1. del: Vijaki in matice - Razredi izdelave A, B in C (ISO 4759-1:2000)

General Information

• Status: Published
• Publication Date: 30-Jun-2002
• ICS: 21.060.10 - Bolts, screws, studs
• ICS: 21.060.20 - Nuts
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2002
• Due Date: 01-Jul-2002
• Completion Date: 01-Jul-2002
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: EN ISO 4759-1:2000 - Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C (ISO 4759-1:2000)

Relations

• Replaces: SIST ISO 4759-1:1996 - Tolerances for fasteners -- Part 1: Bolts, screws and nuts with thread diameters between 1,6 (inclusive) and 150 mm (inclusive) and product grades A, B and C
• Effective Date: 01-Jul-2002

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 4759-1:2002
01-julij-2002
Nadomešča:
SIST ISO 4759-1:1996
Tolerance za vezne elemente - 1. del: Vijaki in matice - Razredi izdelave A, B in C
(ISO 4759-1:2000)
Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B
and C (ISO 4759-1:2000)
Toleranzen für Verbindungselemente - Teil 1: Schrauben und Muttern - Produktklassen
A, B und C (ISO 4759-1:2000)
Tolérances des éléments de fixation - Partie 1: Vis, goujons et écrous - Grades A, B et C
(ISO 4759-1:2000)
Ta slovenski standard je istoveten z: EN ISO 4759-1:2000
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
21.060.20 Matice Nuts
SIST EN ISO 4759-1:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 4759-1:2002

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SIST EN ISO 4759-1:2002





 




 







 

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---------------------- Page: 3 ----------------------
SIST EN ISO 4759-1:2002
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SIST EN ISO 4759-1:2002
INTERNATIONAL ISO
STANDARD 4759-1
Second edition
2000-11-15
Tolerances for fasteners —
Part 1:
Bolts, screws, studs and nuts — Product
grades A, B and C
Tolérances des éléments de fixation —
Partie 1: Vis, goujons et écrous — Grades A, B et C
Reference number
ISO 4759-1:2000(E)
©
ISO 2000

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
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ii © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Contents Page
Foreword.iv
1 Scope .1
2 Normative references .2
3 Tolerances for metric bolts, screws and studs .3
4 Tolerances for metric nuts.25
5 Tolerances for tapping screws.36
Annex A (informative) Tolerances .44
Annex B (informative) Examples of dimensioned and toleranced fasteners.46
Annex C (informative) Examples of gauges and other measuring devices .49
© ISO 2000 – All rights reserved iii

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
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.
Attention is drawn to the possibility that some of the elements of this part of ISO 4759 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 4759-1 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee
SC 7, Reference Standards for fasteners (mainly covering terminology, dimensioning, sizes and tolerancing).
This second edition cancels and replaces the first edition (ISO 4759-1:1978), which has been technically 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: Plain washers for bolts, screws ans nuts — Product grades A and C
Annexes A to C of this part of ISO 4759 are for information only.
iv © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
INTERNATIONAL STANDARD ISO 4759-1:2000(E)
Tolerances for fasteners —
Part 1:
Bolts, screws, studs and nuts — Product grades A, B and C
1 Scope
This part of ISO 4759 specifies a selection of tolerances for bolts, screws, studs and nuts with ISO metric threads
and with product grades A, B and C and for tapping screws with product grade A.
NOTE The product grades refer to the size of the tolerances where grade A is the most precise and grade C is the least
precise.
The tolerances, except tolerances for threads, are selected from the system of limits and fits specified in ISO 286-1
and ISO 286-2. The tolerances for metric threads are taken from the series of tolerance classes specified in
ISO 965-3. The tolerances for tapping screw threads are covered in ISO 1478.
The tolerances of form and position are specified and indicated in accordance with ISO 1101, ISO 8015 and
ISO 2692.
The tolerances specified in this part of ISO 4759 apply to fasteners prior to coating unless otherwise specified. See
also ISO 4042.
Deviations from the tolerances specified in this part of ISO 4759 are only permitted in product standards where
there are valid technical reasons. In cases where there is a difference between the tolerance requirements in this
part of ISO 4759 and the product standard, the product standard takes precedence.
It is recommended that these tolerances also be used for non-standard fasteners.
Dimensions and tolerances given in this part of ISO 4759 are in millimetres.
© ISO 2000 – All rights reserved 1

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 4759. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 4759 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 225:1983, Fasteners — Bolts, screws, studs and nuts — Symbols and designation of dimensions.
ISO 286-1:1988, ISO system of limits and fits — Part 1: Bases of tolerances, deviations and fits.
ISO 286-2:1988, ISO system of limits and fits — Part 2: Tables of standard tolerance grades and limit deviations for
holes and shafts.
ISO 885:2000, General purpose bolts and screws — Metric series — Radii under the head.
ISO 965-3:1998, ISO general purpose metric screw threads — Tolerances — Part 3: Deviations for constructional
screw threads.
ISO 1101:2000, Geometrical Product Specifications (GPS) — Geometrical tolerancing — Tolerances of form,
orientation, location and run-out.
ISO 1478:1999, Tapping screws thread.
ISO 1479:1983, Hexagon head tapping screws.
ISO 2692:1988, Technical drawings — Geometrical tolerancing — Maximum material principle.
ISO 4032:1999, Hexagon nuts, style 1 — Product grades A and B.
ISO 4042:1999, Fasteners — Electroplated coatings.
ISO 4757:1983, Cross recesses for screws.
ISO 7053:1992, Hexagon washer head tapping screws.
ISO 7721:1983, Countersunk head screws — Head configuration and gauging.
ISO 8015:1985, Technical drawings — Fundamental tolerancing principle.
ISO 10509:1992, Hexagon flange head tapping screws.
ISO 10642:1997, Hexagon socket countersunk head screws.
ISO 10664:1999, Hexalobular internal driving feature for bolts and screws.
2 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
3 Tolerances for metric bolts, screws and studs
3.1 Dimensional tolerances
Symbols and designations of dimensions are specified in ISO 225.
Tolerance for product grades
Feature Notes
AB C
3.1.1 Tolerance level
Shank and bearing surface close close wide
Other features close wide wide
3.1.2 External thread 6g 6g 8g For certain
products and
(but 6g for
coatings, other
property
tolerance classes
class 8.8
for threads may
and higher)
be specified in the
relevant product
and coating
standards.
3.1.3 Driving features
s Tolerance s Tolerance
3.1.3.1 External
u 30 h13 u 18 h14
3.1.3.1.1 Width across flats
>30 h14 >18u 60 h15
>60u 180 h16
>180 h17
Figure 1
Figure 2
© ISO 2000 – All rights reserved 3

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
3.1.3.1.2 Width across corners
e =1,13 s
min min
e =1,12 s for bolts and screws with flange
min min
and other cold forged heads without trimming
operation
Figure 3
e =1,3 s
min min
Figure 4
3.1.3.1.3 Height of head k Tolerance
js14 js15 < 10 js16
js17
W 10
Figure 5
4 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
For hexagon bolts and screws with flange, k is
defined only as a maximum
Figure 6
3.1.3.1.4 Wrenching height k defines the
w
length over which
e applies but
min
excluding any
chamfer, washer
face or radius
specified in the
appropriate
a
k =0,7 k product standard.
w min min
Theformulaefor
k only apply
wmin
to the products
Figure 7
illustrated.
a
The symbol k
w
replaces the
previously used k�.
b
��de� For gauging,
��
wmin min
b
��
kk= 0,7 � ��IT15x� tan�
���
max max
see annex A of the
wmin
2
��
��
��
product standards
x is the greater of c � 1,25 or c +0,4
min min
� is the flange angle
a
Dimensions k , k, d , e and � are in accordance
w w
with ISO 225.
Figure 8
Figure 8 a)
© ISO 2000 – All rights reserved 5

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
3.1.3.2 Internal
e =1,14 s
3.1.3.2.1 Hexagon sockets
min min
s Tolerance
0,7 EF8
0,9 JS9
1,3 K9
1,5
2
——
D11
2,5
3
Figure 9
4E11
5
6
8
E12
10
12
14
>14 D12
3.1.3.2.2 Slots
n Tolerance Tolerance field
+0,20
u 1 C13 for nu 1
+0,06
>1u 3 +0,31 C14 for n >1
+0,06
>3u 6 +0,37
+0,07
——
Figure 10
6 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
3.1.3.2.3 Depth of hexagon sockets The depth of hexagon —— For the time being
and slots sockets and slots is generally
specified in product applicable
standards only as a tolerances cannot
minimum. It is be specified.
restricted by the
minimum wall
thickness w.
Figure 11
3.1.3.2.4 Cross recesses See ISO 4757 for all dimensions except pen-
etration depths. For penetration depths see
appropriate product standard.
3.1.3.2.5 Hexalobular recesses
See ISO 10664 for all dimensions except pen-
etration depths. For penetration depths see
appropriate product standard.
3.1.4 Other features
3.1.4.1 Head diameter
a
� IT13 for
a
——
h13
knurled heads
Figure 12
Combined control
of diameter and
height for counter-
sunk head screws
in accordance
with ISO 7721 or
ISO 10642.
h14 ——
Figure 13
© ISO 2000 – All rights reserved 7

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
3.1.4.2 Head height
(except for hexagon heads)
u M5: h13
——
>M5: h14
Figure 14
For countersunk head screws k is definied in
Combined control
product standards only as a maximum. of diameter and
height for counter-
sunk head screws
in accordance
with ISO 7721 or
ISO 10642.
Figure 15
3.1.4.3 Bearing face diameter and d = s – IT16 for width across flats < 21 mm For product
wmin min
height of washer-faced portion grade C a
d =0,95 s for width across flatsW 21 mm
wmin min
washer face is
not mandatory.
d = s
wmax actual
c
Thread
min. max.
diameter
W 1,6 to 2,5 0,10 0,25
>2,5 to 4 0,15 0,40
>4 to 6 0,15 0,50
>6 to 14 0,15 0,60
>14to 36 0,20 0,80
>36 0,30 1,0
a
Reference datum for d
w
Figure 16
8 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
d is defined in product standards only as a
w
minimum.
a
Reference datum for d
w
Figure 17
Thread d For product grade
w
diameter Aonly
min.
� u
2,5 d – 0,14
kmin
2,5 5 d – 0,25
kmin
510 d – 0,4
kmin
10 16 d – 0,5
kmin
16 24 d – 0,8
kmin
a
Reference datum for d
w
24 36 d – 1
kmin
Figure 18
36 — d – 1,2
kmin
d for undercut
a
products, see the
appropriate
d for products without undercut is specified
a
product standard.
in ISO 885.
Figure 19
© ISO 2000 – All rights reserved 9

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
3.1.4.4 Length
lu 150: js17
js15 js17
l > 150: ��IT17
Figure 20
10 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
3.1.4.5 Thread length P is the pitch of
thread.
Bolt
l is the minimum
s
length of the un-
threaded (plain)
shank.
2P 2P 2P
+ + + l is the maximum
b b b g
0 0 0
length of the un-
threaded shank
(thread run-out in-
cluded) and is
therefore the
minimum
Tie rod
clamping length.
Tolerance + 2 P
related to
2P 2P 2P
+ + +
dimension b
b b b
0 0 0
applies only
where l and l
s g
are not specified
in the product
Stud
standard.
b refers to metal
m
2P 2P 2P
+ + +
b b b
end of studs
0 0 0
only.
b js16 b js17 b js17
m m m
Figure 21
3.1.4.6 Shank diameter
The tolerance is
not applicable in
the areas of the
h13 h14 � IT 15
underhead fillet
and thread
run-out.
Reduced shank diameter � pitch diameter
Figure 22
© ISO 2000 – All rights reserved 11

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
3.2 Geometrical tolerances
In accordance with ISO 1101 and ISO 2692 the tolerances specified in Figures 23 to 57 do not necessarily imply
the use of any particular method of production, measurement or gauging.
When the pitch diameter axis is specified as the datum and the coaxiality deviation of the major diameter axis
relative to the pitch diameter axis is negligible, e.g. normally with rolled threads, the major diameter axis may be
taken as the datum.
According to ISO 1101 when the datum is the thread axis the letters MD indicate that the datum reference is the
major diameter axis.
The maximum material principle in accordance with ISO 2692 is used.
Tolerance t for product grades
Feature Notes
AB C
3.2.1 Driving feature
3.2.1.1 Tolerances of form
3.2.1.1.1 External
a
3� simultaneously.
Figure 23
a
2� simultaneously.
Figure 24
12 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
3.2.1.1.2 Internal
a
3� simultaneously.
Figure 25
3.2.1.2 Tolerances of position
2IT13 2IT14 2IT15 s
a
The datum A shall be as close to the head as possible but within 0,5d distance of the head and shall be either wholly
plain or wholly threaded but shall not include the thread run-out or underhead fillet.
b
MD means that tolerance applies in relation to the axis of the cylinder derived from the major thread diameter.
c
3� simultaneously.
Figure 26
2IT13 2IT14 — s
a, b, c
See Figure 26.
Figure 27
© ISO 2000 – All rights reserved 13

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
d
2IT13 ——
a, b, c
SeeFigure26
Figure 28
d
2IT13 ——
a, b, c
SeeFigure26.
Figure 29
2IT13 —— d
a, b, c
SeeFigure26.
Figure 30
14 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
d
2IT12 ——
b, c
See Figure 26.
Figure 31
2IT12 2IT13 2IT14 d
a, b
SeeFigure26
Figure 32
2IT12 2IT13 2IT14 d
a, b
See Figure 26.
Figure 33
2IT12 2IT13 2IT14 d
a, b
See Figure 26.
Figure 34
© ISO 2000 – All rights reserved 15

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
d
2IT12 ——
b
See Figure 26.
Figure 35
2IT13 —— d
a, b
See Figure 26.
c
For referee purposes coaxiality of cross recess shall be assessed by means of a penetration gauge point in accordance
with ISO 4757.
Figure 36
d
2IT13 ——
a, b
See Figure 26.
c
See Figure 36.
Figure 37
16 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
3.2.2 Other features
3.2.2.1 Tolerances of position
and run-out
d
2IT13 2IT14 2IT15
k
a, b
See Figure 26.
Figure 38
d
2IT13 2IT14 —
c
a, b
See Figure 26.
Figure 39
2IT13 2IT14 2IT15 d
c
PD means that the tolerance applies in relation to the axis derived from the pitch diameter.
Figure 40
© ISO 2000 – All rights reserved 17

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
d
For set
screws.
e
For all other
products.
d
IT13
d
——
e
2IT13
c
See Figure 40.
Figure 41
IT13 —— d
c
See Figure 40.
Figure 42
IT13 —— d
c
See Figure 40.
Figure 43
18 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
2IT13 2IT14 2IT15 d
c
See Figure 40.
Figure 44
d
IT13 IT14 IT15
c
See Figure 40.
d
The gauge datum feature A shall be as close to the respective part of the shank as possible but shall avoid the thread
run-out.
Figure 45
d
IT13 IT14 —
c
See Figure 40.
d
The gauge datum features A and B shall be as close to the respective part of the shank as possible but shall avoid the
thread run-out.
Figure 46
© ISO 2000 – All rights reserved 19

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
3.2.2.2 Tolerances
of straightness
d
t =0,002l +0,05
u 8
>8 t =0,002 5l +0,05
b
See Figure 26.
Figure 47
d
u 8 t = 0,002l+0,05
>8 t =0,002 5l+0,05
b
See Figure 26.
Figure 48
d
t =0,002l +0,05
u 8
>8 t =0,002 5l +0,05
—
b
See Figure 26.
Figure 49
20 © ISO 2000 – All rights reserved
du 8: t = 2(0,002l + 0,05)
du 8: t = 2(0,002l + 0,05)
d >8:t=2(0,0025l + 0,05)
d >8: t=2(0,002 5l + 0,05)

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
based on
Feature Notes
dimension
AB C
d
b
See Figure 26.
Figure 50
For product
3.2.2.3 Tolerance of total run-out
1,6
0,04 grades A and B
2 tolerance t is
calculated as
2,5
follows:
—
u M 39:
3
0,08
t =1,2 d����tan 1�
3,5
> M 39:
t=1,2 d����tan 0,5�
4
For product
5
grade C
6 tolerance t is
0,15 0,3
twice as much.
7
a, b
See Figure 26.
c
Up to 0,8s diameter only.
0,17 0,34 8
0,21 0,42 10
Figure 51
0,25 0,50 12
0,29 0,58 14
0,34 0,68 16
0,38 0,76 18
0,42 0,84 20
0,46 0,92 22
0,50 1,00 24
0,57 1,14 27
0,63 1,26 30
a, b
See Figure 26.
0,69 1,38 33
c
Up to 0,8 d diameter only.
k
0,76 1,52 36
Figure 52
0,82 1,64 39
0,44 0,88 42
0,47 0,94 45
0,50 1 48
0,55 1,1 52
© ISO 2000 – All rights reserved 21
du 8: t = 2(0,002l + 0,05)
d >8: t =2(0,002 5l + 0,05)

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
based on
Feature Notes
dimension
AB C
d
1,6
0,04 —
2
2,5
3
0,08
3,5
0,3 4
5
0,15 6
a, b 7
See Figure 26.
c 0,17 0,34 8
Up to 0,8 d diameter only.
k
0,21 0,42 10
Figure 53 See Figures 51
and 52
0,25 0,50 12
0,29 0,58 14
In case of flange
0,34 0,68 16
bolts, tolerances
0,38 0,76 18
apply to type F
and type U.
0,42 0,84 20
0,46 0,92 22
0,50 1,00 24
0,57 1,14 27
0,63 1,26 30
a, b
See Figure 26.
0,69 1,38 33
c
Line of highest points on any radial line.
0,76 1,52 36
Figure 54
0,82 1,64 39
0,44 0,88 42
0,47 0,94 45
0,50 1 48
0,55 1,1 52
22 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
Basis
for t see
For t see Figures 51 to 54
Figures 51
to 54
a, b
See Figure 26.
c
See Figure 51.
Figure 55
For dog points
only, not for pilot
points
a, b
See Figure 26.
c
Up to� 0,8d only
p
Figure 56
© ISO 2000 – All rights reserved 23

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance t for product grades Tolerance t
Feature based on Notes
AB C
dimensions
3.2.2.4 Permissible deviation
from the form of bearing face
0,005 d d
c
radial lines between d and d .
amax wmin
d
According to product standard.
Figure 57
24 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
4 Tolerances for metric nuts
4.1 Dimensional tolerances
NOTE Symbols and designations of dimensions are specified in ISO 225.
Tolerance for product grades
Feature Notes
AB C
4.1.1 Tolerance level
Bearing surface close close wide
Other features close wide wide
6H 6H 7H
4.1.2 Internal thread
For certain
products and
coatings, other
For all nuts of heights mW 0,8d the minor diameter tolerance classes
shall be within the specified tolerances for a
may be specified
minimum of 0,5 m (only for sizesW M3). in the relevant
max
product and
coating
standards.
For all nuts of heights 0,5du m<0,8d the minor
diameter shall be within the specified tolerances
for a minimum of 0,35 m
max
For prevailing torque type nuts the minor diameter
may exceed the specified tolerance for a maxi-
mum height of 0,35d from the non-restricted end
which does not contain the prevailing torque
feature.
a
Profile varies for different types of
prevailing torque type nuts.
Figure 58
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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
4.1.3 Driving features
4.1.3.1 Width across flats
Toler-
s s Tolerance
ance
u 30 h13 u 18 h14
>30 h14 >18u 60 h15
>60u 180 h16
Figure 59
>180 h17
Seefigure59 Seefigure59
Figure 60
4.1.3.2 Width across corners
e =1,13 s
min min
Figure 61
e =1,3 s
min min
Figure 62
26 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
4.1.4 Other features
4.1.4.1 Height of nuts
du 12 mm: h14
For slotted nuts
h17 and castle nuts
12 mm < du 18 mm: h15
see 4.1.5.1
d > 18 mm: h16
Figure 63
Prevailing torque type nuts (with non-
metallic insert)
Prevailing torque type all metal hexagon Tolerance of h, see product
nuts standards
Figure 64
© ISO 2000 – All rights reserved 27

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
4.1.4.2 Wrenching height m defines the
w
length over which
e applies but
min
excluding any
chamfer or
washer face
a
specified in the
m =0,8 m
w min min
appropriate
product standard.
The symbol m
w
replaces the
previously used
Figure 65
m�.
a
The formulae
��
��de�
wmin min
b
mm��0,8���x� tan� for m only
wmin min max wmin
��
2
��
��
��
apply to the
products
illustrated.
x is the greater of c � 1,25 or c +0,4
min min
� is the flange angle
b
For gauging,
a
see annex A
Dimensions m , m, d , e and � are in accordance
w w
of the product
with ISO 225.
standards.
Figure 66
28 © ISO 2000 – All rights reserved

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SIST EN ISO 4759-1:2002
ISO 4759-1:2000(E)
Tolerance for product grades
Feature Notes
AB C
4.1.4.3 Bearing face diameter d = s � IT16 for width across flats � 21 mm
wmin min
and height of washer-faced portio
...

SLOVENSKI STANDARD
SIST EN ISO 4759-1:2002
01-julij-2002
Tolerance za vezne elemente - 1. del: Vijaki in matice - Razredi izdelave A, B in C
(ISO 4759-1:2000)
Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B
and C (ISO 4759-1:2000)
Toleranzen für Verbindungselemente - Teil 1: Schrauben und Muttern - Produktklassen
A, B und C (ISO 4759-1:2000)
Tolérances des éléments de fixation - Partie 1: Vis, goujons et écrous - Grades A, B et C
(ISO 4759-1:2000)
Ta slovenski standard je istoveten z: EN ISO 4759-1:2000
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
21.060.20 Matice Nuts
SIST EN ISO 4759-1:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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