SIST EN 6052:2022
(Main)Aerospace series - Rivet-collar-system, aluminium alloy, shear type, inch series - Technical Specification
Aerospace series - Rivet-collar-system, aluminium alloy, shear type, inch series - Technical Specification
This document defines the requirements for qualification, acceptance, delivery and inspection of 100° countersunk head, 100° countersunk reduced head and protruding head close tolerance pins, shear type in aluminium alloy 7050T73 and collars of aluminium alloy 3003 and of aluminium alloy 6061T7 for use as permanent fasteners in aerospace applications.
Luft- und Raumfahrt - Passniet-Schließring-System aus Aluminiumlegierung für Scherbeanspruchung, Zöllige Reihe - Technische Lieferbedingungen
No Scope available
Série aérospatiale - Système rivet-collier, alliage d'aluminium, type cisaillement, série en inches - Spécification technique
No Scope available
Aeronavtika - Sistem zakovic, aluminijeva zlitina, strižni tip, palčne mere - Tehnična specifikacija
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 6052:2022
01-december-2022
Aeronavtika - Sistem zakovic, aluminijeva zlitina, strižni tip, palčne mere -
Tehnična specifikacija
Aerospace series - Rivet-collar-system, aluminium alloy, shear type, inch series -
Technical Specification
Luft- und Raumfahrt - Passniet-Schließring-System aus Aluminiumlegierung für
Scherbeanspruchung, Zöllige Reihe - Technische Lieferbedingungen
Série aérospatiale - Système rivet-collier, alliage d'aluminium, type cisaillement, série en
inches - Spécification technique
Ta slovenski standard je istoveten z: EN 6052:2022
ICS:
49.025.20 Aluminij Aluminium
49.030.60 Kovice Rivets
SIST EN 6052:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 6052:2022
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SIST EN 6052:2022
EN 6052
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 49.030.60
English Version
Aerospace series - Rivet-collar-system, aluminium alloy,
shear type, inch series - Technical Specification
Série aérospatiale - Système rivet-collier, alliage Luft- und Raumfahrt - Passniet-Schließring-System aus
d'aluminium, type cisaillement, série en inches - Aluminiumlegierung für Scherbeanspruchung, Zöllige
Spécification technique Reihe - Technische Lieferbedingungen
This European Standard was approved by CEN on 6 October 2022.
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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 6052:2022 E
worldwide for CEN national Members.
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SIST EN 6052:2022
EN 6052:2022 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General requirements . 5
5 Requirements for pins in aluminium alloy 7050-T73 . 5
6 Requirements for collars in aluminium alloy 3003 and 6061. 8
7 Certification and quality assurance . 10
7.1 Qualification tests . 10
7.2 Quality conformance inspection . 10
7.3 Quality control records . 10
7.4 Lot . 10
8 Delivery . 20
8.1 Unit type containers . 20
8.2 Unit packages . 20
9 Quality management system. 20
Annex A (informative) Record of revisions . 21
Bibliography. 22
2
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SIST EN 6052:2022
EN 6052:2022 (E)
European foreword
This document (EN 6052:2022) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, 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 April 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
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.
3
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SIST EN 6052:2022
EN 6052:2022 (E)
1 Scope
This document defines the requirements for qualification, acceptance, delivery and inspection of 100°
countersunk head, 100° countersunk reduced head and protruding head close tolerance pins, shear
type in aluminium alloy 7050-T73 and collars of aluminium alloy 3003 and of aluminium alloy 6061-T7
for use as permanent fasteners in aerospace applications.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 3115, Aerospace series — Aluminium alloy 7050-T73 — Wire for solid rivets — D ≤ 10 mm
1
ANSI/ASQ Z 1.4, Sampling Procedures and Tables for Inspection by Attributes
1
ANSI/ASME B 46.1, Surface Texture, Surface Roughness, Waviness and Lay
2
ASTM-B193, Standard Test Method for Resistivity of Electrical Conductor Materials
2
ASTM E 1417/E 1417M, Standard Practice for Liquid Penetrant Testing
2
ASTM E 8/E 8Ma, Standard Test Methods for Tension Testing of Metallic Materials
2
ASTM-E92, Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials
ASTM-G-110, Standard Practice for Evaluating Intergranular Corrosion Resistance of Heat Treatable
2
Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide Solution
3
NASM1312, Fastener Test Methods
4
FED-SPEC QQ-A-430, Aluminium Alloy Rod and Wire, for Rivets and Cold Heading
5
SAE AMS2644, Inspection Material, Penetrant
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp/
• IEC Electropedia: available at https://www.electropedia.org/
1 Published by: Department of Defense (DoD), the Pentagon, Washington, D.C., 20307, USA.
2 Published by: American Society for Testing and Materials, 100 Barr Harbor Dr., West Conshohocken, P.A., 19428,
USA.
3 Published by: Aerospace Industries Association of America Inc. (AIA), 1250 Eye Street, N.W., Washington, D.C.,
20005-3924, USA.
4 Published by: Superindendent of documents, US Government Printing House, Washington, D.C., 20402, USA.
5 Published by: Engineering Society for Advancing Mobility Land, Sea, Air and Space International (SAE),
400 Commonwealth Drive, Warrendale, P.A., 15096-0001, USA.
4
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SIST EN 6052:2022
EN 6052:2022 (E)
4 General requirements
The close tolerance pins and collars covered by this specification shall be of the types, sizes,
configurations and materials designated by the part numbers specified on the applicable standards
which refer to this specification.
5 Requirements for pins in aluminium alloy 7050-T73
The requirements for 7050-T73 aluminium alloy pins, shear type are given in Table 1. These
requirements complement the requirements of all other standards or specifications referenced in the
document of the pins and may be overridden only when specially instructed in the definition document.
Inspection tests given in Table 1 and Table 2 are mandatory (except as noted) on each lot as defined in
7.2 for the fastener manufacturer. Tests which are not mandatory for the fastener manufacturer may be
applied by the receiving contractor.
Table 1 — Requirements for pins in aluminium alloy 7050-T73
Inspection and test Qualification Acceptance
Clause Characteristic Technical requirement
method Sampling Sampling
5.1 General The dimensions and any deviations in Conventional
dimensions form and position, measured at measuring methods
ambient temperature, shall be within
the limits specified in the standard part
drawings and this procurement
specification
5.2 Shank Underfill permissible, shall be within Standard
diameter the specified shank diameter range micrometer 6,35 mm
(¼”) diameter
5.3 Shank Refer to Table 8 Conventional
straightness measuring methods
According to According to
5.4 Sealant escape Refer to Figure 3 and Table 10
Table 3 Table 5
groove
5.5 Head According to standard part drawings In accordance with
protrusion EN pin standards
(100° heads)
5.6 Surface texture Visual examination
according to
ANSI/ASME B 46.1
5.7 Lubricants According to
applicable
5.8 Finish
specification and
visual examination
5.9 Product Visual examination
identification
5.10 Delivery Refer to Clause 8 N/A
5.11 Shear strength Table 7 double shear values are Test no 13 of
applicable for pins having a grip of 2 × NASM1312
nominal diameter or greater for
protruding head type and grip of 2,5 ×
According to According to
nominal diameter or greater for flush
Table 3 Table 6
head type. If the pin is too short to
perform the shear test, a piece of wire
of the same raw material lot heat
treated with the fasteners shall be
tested. The test wire shall have the
5
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SIST EN 6052:2022
EN 6052:2022 (E)
Inspection and test Qualification Acceptance
Clause Characteristic Technical requirement
method Sampling Sampling
same coating as for pins.
Minimum shear strength test of
fasteners is to be performed on pins or
wire without cetyl alcohol lubrication
applied.
5.12 Tensile Table 7 values are applicable for pins Test no 8 of
strength having a grip of 1,5 × nominal diameter NASM1312
or greater.
Qualification and acceptance testing
shall be performed with a 7° sloped
surface (collar side) in minimum and
maximum grip with collar according to
collar standard.
5.13 Head dishing After installation in a clearance fit of Test no. 8 of
0,025 mm, head dishing of flush head NASM1312
pins shall not exceed 0,076 mm (see
Figure 6).
Testing shall be performed with a
7° sloped surface (collar side) in
minimum and maximum grip.
5.14 Pin break load Table 7 values are applicable.
Tensile load shall be applied axially at Test no. 8 of
a rate, which breaks the pin at a NASM1312
minimum of 4 s of load application.
Test plate countersink for countersunk
pins shall have 2° angular
misalignment from the hole centerline.
Test plate for protruding head pins
shall have a 2° slope under the pin
head.
After evaluation of the pin break loads, ASTM E 1417/E 141
head dishing of flush head pins shall 7M
not exceed 0,076 mm (see Figure 6).
Cracks shall not be allowed in any
location of the pin. The presence of
cracks shall be determined by
fluorescent penetrant inspection
according to ASTM E 1417/E 1417M,
method B or D, sensitivity level 2 or
higher.
The penetrant materials used shall be
according to SAE AMS2644. Examine
all surfaces at 10 × to 30 ×
magnification.
6
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SIST EN 6052:2022
EN 6052:2022 (E)
Inspection and test Qualification Acceptance
Clause Characteristic Technical requirement
method Sampling Sampling
Penetrant inspection shall be
performed prior to all surface coating
and lubricating.
5.15 Preload Table 7 values are applicable to pins Test no. 16 of
having a nominal grip of 1,5 × nominal NASM1312
diameter or greater.
Qualification testing shall be
performed with a 7° sloped surface
According to
(collar side) in minimum and
Table 6
maximum grip with a collar having low
strength according to collar standard.
Acceptance testing shall be performed
with a 7° sloped surface (collar side) in
minimum and maximum grip.
5.16 Fatigue life Average life 65 000 cycles, minimum Test no. 11 of
life 45 000 cycles, loads according to NASM1312
Table 7.
Tests shall be performed on pins N/A
having a grip of 3 × nominal diameter.
Tests shall be performed in maximum
According to
grip condition.
Table 3
5.17 Installation Pins shall be pulled into Use standard
0,076 mm ± 0,005 mm interference fit pneumatic
in 2024T3 aluminium plate in installation tools and
maximum grip. conventional
measuring methods.
No premature breakage of the
standard installation pintail shall
For all installation
occur. Installation load shall not exceed
tests there shall be a
90 % of minimum pin break load. Test
transition radius of
to be performed using pins with
N/A
0,5 mm to 0,7 mm on
longest grip length.
edge of fastener hole
(head side).
Tests shall be
perfomed in
maximum grip
conditions with a
3° sloped surface
(collar side).
5.18 Test collars Test collars are specified in Table 7 Refer to Table 7
unless stated otherwise
5.19 Material 7050-T73 aluminium alloy according Verify composition Each tenth lot from each mill
to FED-SPEC QQ-A-430 and EN 3115,
Verify mechanical
shear strength 283 MPa to 324 MPa.
Each lot
properties
5.20 Discontinuities Discontinuities shall be permitted only The presence of
as outlined in Figure 1 and Table 9. cracks shall be
determined by
Specimens shall be prepared as shown
fluorescent
According to According to
in Figure 2. All surfaces shall be
penetrant inspection
Table 3 Table 6
examined at 10 × to 30 × magnification.
according to ASTM E
Indications shall be evaluated by
1417/E 1417M,
metallurgical examination of cross
method B or D,
sections at 50 × to 60 × magnification.
sensitivity level 2 or
7
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SIST EN 6052:2022
EN 6052:2022 (E)
Inspection and test Qualification Acceptance
Clause Characteristic Technical requirement
method Sampling Sampling
higher.
Cracks shall not be allowed in any Penetrant materials
location of the pin. used according to
SAE AMS2644.
Penetrant inspection shall be
performed prior to all surface coating
and lubricating or with all coatings
removed.
5.21 Electrical Requirements for EC [% IACS] shall be ASTM-B193
conductivity as follows:
Test shall be
(EC)
performed on a wire
EC ≥ 40 %: Lot is acceptable
from the same wire
lot and heat
EC ≥ 38 % and < 40 %: SCF test
treatment as the pin
required
or on top of the pin
head after smooth
EC < 38 %: Lot is rejectable
and flat machining
(R = 32µm).
A
5.22 Stress Test shall be required if EC ≥ 38 % and ASTM E 8/E 8Ma
corrosion < 40% (see 5.21) (0,2 % offset
factor (SCF) method)
SCF shall be < 32 % and shall be
calculated as follows:
SCF = ys [Pa] − EC [% IACS]
Tensile yield strength shall be
measured on a wire from the same
wire lot and heat treatment as the pin.
5.23 Intergranular Intergranular corrosion according to
corrosion ASTM-G-110
Localised intergranular corrosion shall
not exceed 0,3 mm in depth. Average ASTM-G-110
depth shall not exceed 0,2 mm.
5.24 Microstructure Microstructure shall be free from
bursts, voids and overheating
6 Requirements for collars in aluminium alloy 3003 and 6061
The requirements for collars in 3003 and 6061 aluminium alloy, shear type are given in Table 2. These
requirements complement the requirements of all other standards or specifications referenced in the
documents of the collars, and may be overridden only when specially instructed in the definition
document.
Inspection tests given in Table 1 and Table 2 shall be mandatory (except as noted) on each lot as
defined in 7.2 for the fastener manufacturer.
8
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SIST EN 6052:2022
EN 6052:2022 (E)
Table 2 — Requirements for collars in aluminium alloy 3003 and 6061
Inspection and test Qualification Acceptance
Clause Characteristic Technical requirement
method Sampling Sampling
The dimensions and any deviations in
form and position, measured at
General ambient temperature, shall be within Conventional
6.1
dimensions the limits specified in the standard part measuring methods
drawings and this procurement
specification
Visual examination
According to According
6.2 Surface texture according to
Table 4 to Table 5
ANSI/ASME B 46.1
6.3 Lubricants According to
According to standard part drawings applicable
specification and
6.4 Finish
visual examination
Product
6.5
identification
Visual examination
6.6 Delivery Refer to Clause 8 N/A
The ultimate tensile strength of the
installed collar shall be equal to or
greater than the values shown in
Table 7.
Tensile Test no. 8 of
6.7
Qualification and acceptance testing
strength NASM1312
shall be performed with a 7° sloped
surface (collar side) in minimum and
maximum grip with collar according to
According to According
collar standard.
Table 4 to Table 6
The preload of the installed collar shall
be equal to or greater than the values
shown in Table 7.
Test no. 16 of
Qualification and acceptance testing
6.8 Preload
NASM1312
shall be performed with a 7° sloped
surface (collar side) in minimum and
maximum grip with collar according to
collar standard.
Average life 65 000 cycles, minimum
life 45
...
SLOVENSKI STANDARD
oSIST prEN 6052:2021
01-januar-2021
Aeronavtika - Sistem zakovic, aluminijeva zlitina, strižni tip, palčne mere -
Tehnična specifikacija
Aerospace series - Rivet-collar-system, aluminium alloy, shear type, inch series -
Technical Specification
Luft- und Raumfahrt - Passniet-Schließring-System aus Aluminiumlegierung für
Scherbeanspruchung, Zöllige Reihe - Technische Lieferbedingungen
Série aérospatiale - Rivet-bague-systéme, alliage d'aluminium, type cisaillement, série
en inches - Specification Technique
Ta slovenski standard je istoveten z: prEN 6052
ICS:
49.025.20 Aluminij Aluminium
49.030.60 Kovice Rivets
oSIST prEN 6052:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 6052:2021
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oSIST prEN 6052:2021
DRAFT
EUROPEAN STANDARD
prEN 6052
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2020
ICS 49.030.60
English Version
Aerospace series - Rivet-collar-system, aluminium alloy,
shear type, inch series - Technical Specification
Série aérospatiale - Rivet-bague-systéme, alliage Luft- und Raumfahrt - Passniet-Schließring-System aus
d'aluminium, type cisaillement, série en inches - Aluminiumlegierung für Scherbeanspruchung, Zöllige
Specification Technique Reihe - Technische Lieferbedingungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 6052:2020 E
worldwide for CEN national Members.
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oSIST prEN 6052:2021
prEN 6052:2020 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 General requirements . 5
5 Requirements for pins in aluminium alloy 7050T73 . 5
6 Requirements for collars in aluminium alloy 3003 and 6061 . 10
7 Certification and quality assurance . 12
7.1 Qualification tests . 12
7.2 Quality conformance inspection . 12
7.3 Quality control records . 12
7.4 Lot . 12
8 Delivery. 22
8.1 Unit type containers . 22
8.2 Unit packages . 22
9 Quality management system . 22
Annex A (informative) Record of revisions . 23
Bibliography . 24
2
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oSIST prEN 6052:2021
prEN 6052:2020 (E)
European foreword
This document (prEN 6052:2020) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-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
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
3
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oSIST prEN 6052:2021
prEN 6052:2020 (E)
1 Scope
This document defines the requirements for qualification, acceptance, delivery and inspection of 100°
countersunk head, 100° countersunk reduced head and protruding head close tolerance pins, shear
type in aluminium alloy 7050T73 and collars of aluminium alloy 3003 and of aluminium alloy 6061T7
for use as permanent fasteners in aerospace applications.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 3115, Aerospace series — Aluminium alloy 7050-T73 — Wire for solid rivets — D ≤ 10 mm
1
, Sampling procedures and Tables for Inspection by Attributes
ANSI/ASQC-Z1.4
1
ASME-B46.1 , Surface texture (Surface Roughness, Waviness, and Lay)
2
ASTM-B193 , Standard Test Method for Resistivity of Electrical Conductor Materials
2
, Standard Practice for Liquid Penetrant Testing
ASTM-E1417
2
ASTM-E8 , Standard Test Method for Tension Testing of Metallic Materials
2
ASTM-E92 , Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials
2
, Standard Practice for Evaluating Intergranular Corrosion Resistance of Heat Treatable
ASTM-G-110
Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide Solution
3
NASM1312 , Fastener Test Methods
4
QQ-A-430 , Aluminium Alloy Rod and Wire, for Rivets and Cold Heading
5
SAE AMS2644 , Inspection Material, Penetrant
1
Published by: Department of Defense (DoD), the Pentagon, Washington, D.C., 20307, USA.
2
Published by: American Society for Testing and Materials, 100 Barr Harbor Dr., West Conshohocken, P.A., 19428,
USA.
3
Published by: Aerospace Industries Association of America Inc. (AIA), 1250 Eye Street, N.W., Washington, D.C.,
20005 3924, USA.
4
Published by: Superindendent of documents, US Government Printing House, Washington, D.C., 20402, USA.
5
Published by: Engineering Society for Advancing Mobility Land, Sea, Air and Space International (SAE),
400 Commonwealth Drive, Warrendale, P.A., 15096-0001, USA.
4
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oSIST prEN 6052:2021
prEN 6052:2020 (E)
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 General requirements
The close tolerance pins and collars covered by this specification shall be of the types, sizes,
configurations and materials designated by the part numbers specified on the applicable standards that
refer to this specification.
5 Requirements for pins in aluminium alloy 7050T73
The requirements for 7050T73 aluminium alloy pins, shear type are given in Table 1. These
requirements complement the requirements of all other standards or specifications referenced in the
document of the pins and may be overridden only when specially instructed in the definition document.
Inspection tests given in Table 1 and Table 2 are mandatory (except as noted) on each lot as defined in
7.2 for the fastener manufacturer. Tests that are not mandatory for the fastener manufacturer may be
applied by the receiving contractor.
Table 1 — Requirements for pins in aluminium alloy 7050T73
Clause Characteristic Technical requirement Inspection and Qualification Acceptance
test method Sampling Sampling
5.1 General The dimensions and any Conventional According to According
dimensions deviations in form and position, measuring Table 3 to Table 5
measured at ambient methods
temperature, shall be within the
limits specified in the standard
part drawings and this
procurement specification
5.2 Shank Underfill permissible, shall be Standard
diameter within the specified shank micrometre
diameter range 6,35 mm (¼”)
diameter
5.3 Shank Refer to Table 8 Conventional
straightness measuring
methods
5.4 Sealant escape Refer to Figure 3 and Table 10
groove
5.5 Head According to standard part In accordance with
protrusion drawings EN pin standards
(100° heads)
5.6 Surface texture Visual
examination
according to
ANSI-B46.1
5
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oSIST prEN 6052:2021
prEN 6052:2020 (E)
Clause Characteristic Technical requirement Inspection and Qualification Acceptance
test method Sampling Sampling
5.7 Lubricants According to
applicable
5.8 Finish
specification and
visual examination
5.9 Product Visual
identification examination
5.10 Delivery Refer to Clause 8 N/A
5.11 Shear strength Table 7 double shear values are Test no 13 of According to According
applicable for pins having a grip NASM1312 Table 3 to Table 6
of 2 × nominal diameter or
greater for protruding head type
and grip of 2,5 × nominal
diameter or greater for flush
head type. If the pin is too short
to perform the shear test, a piece
of wire of the same raw material
lot heat treated with the
fasteners shall be tested. The
test wire shall have the same
coating as for pins.
Minimum shear strength test of
fasteners is to be performed on
pins or wire without cetyl
alcohol lubrication applied.
5.12 Tensile Table 7 values are applicable for Test no. 8 of
strength pins having a grip of NASM1312
1,5 × nominal diameter or
greater.
Qualification and acceptance
testing shall be performed with a
7° sloped surface (collar side) in
minimum and maximum grip
with collar according to collar
standard.
5.13 Head dishing After installation in a clearance Test no. 8 of
fit of 0,025 mm, head dishing of NASM1312
flush head pins shall not exceed
0,076 mm (see Figure 6).
Testing shall be performed with
a 7° sloped surface (collar side)
in minimum and maximum grip.
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oSIST prEN 6052:2021
prEN 6052:2020 (E)
Clause Characteristic Technical requirement Inspection and Qualification Acceptance
test method Sampling Sampling
5.14 Pin break load Table 7 values are applicable.
Tensile load shall be applied Test no. 8 of
axially at a rate, which breaks NASM1312
the pin at a minimum of 4 s of
load application.
Test plate countersink for
countersunk pins shall have
2° angular misalignment from
the hole centreline.
Test plate for protruding head
pins shall have a 2° slope under
the pin head.
After evaluation of the pin break ASTM-E1417
loads, head dishing of flush head
pins shall not exceed 0,076 mm
(see Figure 6).
Cracks shall not be allowed in
any location of the pin. The
presence of cracks shall be
determined by fluorescent
penetrant inspection according
to ASTM-E1417, method B or D,
sensitivity level 2 or higher.
The penetrant materials used
shall be according to
SAE AMS2644. Examine all
surfaces at 10 × to
30 × magnification.
Penetrant inspection shall be
performed prior to all surface
coating and lubricating.
5.15 Preload Table 7 values are applicable to Test no. 16 of According to According
pins having a nominal grip of NASM1312 Table 3 to Table 6
1,5 × nominal diameter or
greater.
Qualification testing shall be
performed with a 7° sloped
surface (collar side) in minimum
and maximum grip with a collar
having low strength according to
collar standard.
Acceptance testing shall be
performed with a 7° sloped
surface (collar side) in minimum
and maximum grip.
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oSIST prEN 6052:2021
prEN 6052:2020 (E)
Clause Characteristic Technical requirement Inspection and Qualification Acceptance
test method Sampling Sampling
5.16 Fatigue life Average life 65 000 cycles, Test no. 11 of N/A
minimum life 45 000 cycles, NASM1312
loads according to Table 7.
Tests shall be performed on pins
having a grip of 3 × nominal
diameter.
Tests shall be performed in
maximum grip condition.
5.17 Installation Pins shall be pulled into Use standard N/A
0,076 mm ± 0,005 mm pneumatic
interference fit in 2024T3 installation tools
aluminium plate in maximum and conventional
grip. measuring
methods.
No premature breakage of the
standard installation pintail shall
occur. Installation load shall not For all installation
exceed 90 % of minimum pin
tests, there shall
break load. Test to be performed
be a transition
using pins with longest grip
radius of 0,5 mm
length. to 0,7 mm on edge
of fastener hole
(head side).
Tests shall be
performed in
maximum grip
conditions with a
3° sloped surface
(collar side).
5.18 Test collars Test collars are specified in Refer to Table 7
Table 7 unless stated otherwise
5.19 Material 7050-T73 aluminium alloy Verify composition Each tenth lot from each mill
according to QQ-A-430 and
Verify mechanical Each lot
EN 3115, shear strength
properties
283 MPa to 324 MPa.
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oSIST prEN 6052:2021
prEN 6052:2020 (E)
Clause Characteristic Technical requirement Inspection and Qualification Acceptance
test method Sampling Sampling
5.20 Discontinuities Discontinuities shall be The presence of According to According
permitted only as outlined in cracks shall be Table 3 to Table 6
Figure 1 and Table 9. determined by
fluorescent
Specimens shall be prepared as
penetrant
shown in Figure 2. All surfaces
inspection
shall be examined at 10 × to
according to
30 × magnification. Indications
ASTM-E1417,
shall be evaluated by
method B or D,
metallurgical examination of
sensitivity level 2
cross sections at 50 × to
or higher.
60 × magnification.
Cracks shall not be allowed in Penetrant
any location of the pin. materials used
according to
Penetrant inspection shall be
SAE AMS2644.
performed prior to all surface
coating and lubricating or with
all coatings removed.
5.21 Electrical Requirements for EC [% IACS] ASTM-B193
conductivity shall be as follows:
Test shall be
(EC)
performed on a
wire from the
EC ≥ 40 %: Lot is acceptable
same wire lot and
EC ≥ 38 % and < 40 %: SCF test
heat treatment as
required
the pin or on top
of the pin head
EC < 38 %: Lot is rejectable
after smooth and
flat machining
(R = 32µm).
A
5.22 Stress Test shall be required if ASTM-E8
corrosion EC ≥ 38 % and < 40 % (see 5.21) (0,2 % offset
factor (SCF) method)
SCF shall be < 32 % and shall be
calculated as follows:
SCF = ys [Pa] − EC [% IACS]
Tensile yield strength shall be
measured on a wire from the
same wire lot and heat
treatment as the pin.
5.23 Intergranular Intergranular corrosion ASTM-G-110
corrosion according to ASTM-G-110
Localised intergranular
corrosion shall not exceed
0,3 mm in depth. Average depth
shall not exceed 0,2 mm.
5.24 Microstructure Microstructure shall be free
from bursts, voids and
overheating
9
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oSIST prEN 6052:2021
prEN 6052:2020 (E)
6 Requirements for collars in aluminium alloy 3003 and 6061
The requirements for collars in 3003 and 6061 aluminium alloy, shear type are given in Table 2. These
requirements complement the requirements of all other standards or specifications referenced in the
documents of the collars, and may be overridden only when specially instructed in the definition
document.
Inspection tests given in Table 1 and Table 2 shall be mandatory (except as noted) on each lot as
defined in 7.2 for the fastener manufacturer.
Table 2 — Requirements for collars in aluminium alloy 3003 and 6061
Clause Characteristic Technical requirement Inspection and Qualification Acceptance
test method Sampling Sampling
6.1 General The dimensions and any Conventional According to According to
dimensions deviations in form and position, measuring Table 4 Table 5
measured at ambient methods
temperature, shall be within the
limits specified in the standard
part drawings and this
procurement specification
6.2 Surface texture According to standard part Visual
drawings examination
according to
ANSI-B46.1
6.3 Lubricants According to
applicable
6.4 Finish
specification and
visual
examination
6.5 Product Visual
identification examination
6.6 Delivery Refer to Clause 8 N/A
6.7 Tensile The ultimate tensile strength of Test no. 8 of According to According to
strength the installed collar shall be equal NASM1312 Table 4 Table 6
to or greater than the values
shown in Table 7.
Qualification and acceptance
testing shall be performed with a
7° sloped surface (collar side) in
minimum and maximum grip
with collar according to collar
standard.
6.8 Preload The preload of the installed Test no. 16 of
collar shall be equal to or greater NASM1312
than the values shown in
Table 7.
Qualification and acceptance
testing shall be performed with a
7° sloped surface (collar side) in
minimum and maximum grip
wit
...
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