EN 6052:2022

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 7050-T73 and collars of aluminium alloy 3003 and of aluminium alloy 6061-T7 for use as permanent fasteners in aerospace applications.

Luft- und Raumfahrt - Passniet-Schließring-System aus Aluminiumlegierung für Scherbeanspruchung, Zöllige Reihe - Technische Lieferbedingungen

Dieses Dokument legt die Anforderungen für die Qualifikation, Abnahme, Auslieferung und Prüfung von 100° Senk-Passstiften, 100° Senk-Passstiften mit kleinem Kopf und Senk-Passstiften mit überstehendem Kopf für Scherbeanspruchung aus Aluminiumlegierung 7050 T73 und Schließringe aus Aluminiumlegierung 3003 und Aluminiumlegierung 6061 T7 für die Verwendung als dauerhafte Verbindungselemente in Anwendungen der Luft- und Raumfahrt fest.

Série aérospatiale - Système rivet-collier, alliage d'aluminium, type cisaillement, série en inches - Spécification technique

Le présent document définit les exigences relatives à la qualification, la réception, la livraison et le contrôle des broches à tête fraisée 100°, à tête fraisée réduite 100° et à tête saillante, à tolérance serrée et de type cisaillement en alliage d’aluminium 7050-T73, ainsi que des colliers en alliages d’aluminium 3003 et 6061-T7, pour une utilisation en tant qu’élément de fixation permanent dans les applications aérospatiales.

Aeronavtika - Sistem zakovic, aluminijeva zlitina, strižni tip, palčne mere - Tehnična specifikacija

General Information

• Status: Published
• Publication Date: 25-Oct-2022
• ICS: 49.030.60 - Rivets
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3/S 2 - Fasteners
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 26-Oct-2022
• Completion Date: 26-Oct-2022
• Ref Project: SIST EN 6052:2022 - Aerospace series - Rivet-collar-system, aluminium alloy, shear type, inch series - Technical Specification

Overview

EN 6052:2022 - "Aerospace series - Rivet-collar-system, aluminium alloy, shear type, inch series" is a CEN technical specification that defines requirements for the qualification, acceptance, delivery and inspection of close-tolerance rivet-collar systems used as permanent aerospace fasteners. The standard covers 100° countersunk head (including reduced countersunk) and protruding head shear-type pins in aluminium alloy 7050‑T73, together with collars in aluminium alloys 3003 and 6061‑T7, in inch series sizes.

Key topics and technical requirements

• Scope and materials: Pins manufactured from 7050‑T73 (per EN 3115 / FED‑SPEC QQ‑A‑430) and collars from 3003 or 6061‑T7. Close-tolerance, inch-series geometry and head forms (100°) are specified.
• Mechanical tests: Mandatory shear strength, tensile strength, preload and pin break-load tests (referenced NASM1312 test methods). Qualification tests complement part drawings and procurement documents.
• Fatigue life: Specified average life of 65 000 cycles (minimum 45 000) under defined load conditions for specified grips.
• Non‑destructive inspection: Fluorescent penetrant inspection per ASTM E1417/E1417M (SAE AMS2644 penetrants) to detect cracks; metallurgical examination for discontinuities.
• Electrical conductivity (EC): EC thresholds (measured per ASTM‑B193) drive acceptance: EC ≥ 40 % IACS = accept; 38–40 % = stress‑corrosion factor (SCF) test required; < 38 % = reject.
• Corrosion and microstructure: Intergranular corrosion limits per ASTM‑G‑110 and microstructure free from bursts, voids and overheating.
• Surface, finish and installation: Surface texture per ANSI/ASME B46.1, lubrication and finishing requirements, and installation criteria (e.g., 0.076 mm ± 0.005 mm interference in 2024‑T3 test plate, installation load ≤ 90 % of minimum pin break load, specified pintail transition radius).
• Quality & delivery: Lot definition, sampling plans, certification, record keeping, unit packaging and quality management system requirements; acceptance sampling referenced to ANSI/ASQ Z1.4.

Applications and who uses EN 6052:2022

• Aerospace manufacturers and OEMs specifying permanent shear fasteners for fuselage, wing and structure assemblies.
• Fastener suppliers and heat‑treatment mills qualifying batches and demonstrating compliance with mechanical, electrical and corrosion properties.
• Quality assurance, inspection and procurement teams enforcing acceptance tests, lot sampling and delivery documentation.
• Design and maintenance engineers requiring standardized, traceable rivet‑collar performance for structural repairs and replacements.

Keywords: EN 6052:2022, rivet-collar-system, aluminium alloy 7050-T73, collars 3003 6061-T7, shear type, aerospace fasteners, qualification, acceptance, inspection, inch series.

Related standards (selection)

• EN 3115 (7050‑T73 wire for solid rivets)
• NASM1312 (fastener test methods)
• ASTM E1417/E1417M (liquid penetrant testing)
• ASTM E8 (tension testing)
• ASTM‑B193 (electrical conductivity)
• ANSI/ASME B46.1 (surface texture)
• ANSI/ASQ Z1.4 (sampling procedures)
• FED‑SPEC QQ‑A‑430, SAE AMS2644, ASTM‑G‑110

This standard is essential when specifying, procuring or validating shear‑type rivet‑collar systems in aerospace applications to ensure consistent performance, traceability and regulatory compliance.

Standards Content (Sample)

SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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.

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

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.
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
ANSI/ASQ Z 1.4, Sampling Procedures and Tables for Inspection by Attributes
ANSI/ASME B 46.1, Surface Texture, Surface Roughness, Waviness and Lay
ASTM-B193, Standard Test Method for Resistivity of Electrical Conductor Materials
ASTM E 1417/E 1417M, Standard Practice for Liquid Penetrant Testing
ASTM E 8/E 8Ma, Standard Test Methods for Tension Testing of Metallic Materials
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
Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide Solution
NASM1312, Fastener Test Methods
FED-SPEC QQ-A-430, Aluminium Alloy Rod and Wire, for Rivets and Cold Heading
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 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
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.
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
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.
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
...