SIST EN 4321:2004

SLOVENSKI STANDARD
SIST EN 4321:2004
01-maj-2004
Aerospace series - Bolts, double hexagon head with lockwire holes, relieved
shank, long thread, in heat resisting nickelbase alloy NI-PH2601 (Inconel 718),
silver plated - Classification: 1 550 MPa (at ambient temperature) / 650°C
Aerospace series - Bolts, double hexagon head with lockwire holes, relieved shank, long
thread, in heat resisting nickelbase alloy NI-PH2601 (Inconel 718), silver plated -
Classification: 1 550 MPa (at ambient temperature) / 650°C
Ta slovenski standard je istoveten z: EN 4321:2003
ICS:
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
SIST EN 4321:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 4321:2004

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SIST EN 4321:2004
EUROPEAN STANDARD
EN 4321
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2003
ICS 49.030.20
English version
Aerospace series - Bolts, double hexagon head with lockwire
holes, relieved shank, long thread, in heat resisting nickelbase
alloy NI-PH2601 (Inconel 718), silver plated - Classification: 1
550 MPa (at ambient temperature) / 650°C
This European Standard was approved by CEN on 2 June 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4321:2003 E
worldwide for CEN national Members.

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SIST EN 4321:2004
EN 4321:2003 (E)
Contents page
Foreword.3
1 Scope .3
2 Normative references .3
3 Required characteristics.4
3.1 Configuration – Dimensions – Tolerances – Masses.4
3.2 Material.4
3.3 Surface treatment .4
4 Designation.9
5 Marking .9
6 Technical specification .9
2

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SIST EN 4321:2004
EN 4321:2003 (E)
Foreword
This document (EN 4321:2003) has been prepared by the European Association of Aerospace Manufacturers –
Standardization (AECMA-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received
the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its
presentation to CEN.
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 July 2003, and conflicting national standards shall be withdrawn at the latest by
July 2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
1 Scope
This standard specifies the characteristics of double hexagon headed bolts with lockwire holes, relieved shank and
long thread, in NI-PH2601, silver plated, for aerospace applications.
1) 2)
Classification: 1 550 MPa / 650 °C
2 Normative references
ISO 3353 Aerospace – Rolled threads for bolts – Lead and runout requirements
ISO 4095 Aerospace – Bihexagonal drives – Wrenching configuration – Metric series
ISO 5855-2 Aerospace – MJ threads – Part 2: Limit dimensions for bolts and nuts
EN 2424 Aerospace series – Marking of aerospace products
3)
EN 2786 Aerospace series – Electrolytic silver plating of fasteners
EN 2952 Aerospace series – Heat resisting alloy NI-PH2601 – Solution treated and cold worked – Bar for
3)
forged fasteners – D £ 50 mm – 1 270 MPa £ R £ 1 550 MPa
m
EN 3666 Aerospace series – Heat resisting alloy NI-PH2601 – Solution treated and cold worked – Bar for
3)
forged fasteners – D £ 50 mm - 1 550 MPa £ R £ 1 830 MPa
m
EN 3833 Aerospace series – Bolts, MJ threads, in heat resisting nickel base alloy NI-PH2601 (InconeI 718) –
3)
Classification: 1 550 MPa (at ambient temperature) / 650 °C – Technical specification

1) Minimum tensile strength of the material at ambient temperature
2) Maximum test temperature of the parts
3) Published as AECMA Prestandard at the date of publication of this standard
3

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SIST EN 4321:2004
EN 4321:2003 (E)
3 Required characteristics
3.1 Configuration – Dimensions – Tolerances – Masses
See figure 1 and tables 1 and 2. Dimensions and toler
...