Aerospace series - Pin, close tolerance, swage locking, 100° countersunk reduced head, shear type, in aluminium alloy 7050, conversion coating - Inch series

This document specifies the characteristics of close tolerance pins, swage locking, 100° countersunk reduced head, shear type, in aluminium alloy 7050-T73 with chemical film, inch series, with a maximum operating temperature of 80 °C for aerospace application.

Luft- und Raumfahrt - Passniete für Quetschverriegelung mit reduziertem Senkkopf 100°, für Scherbeanspruchung, aus Aluminiumlegierung 7050, Schmierfilm behandelt - Zoll-Reihe

No Scope available

Série aérospatiale - Rivet de précision, à bague sertie, à tête fraisée 100° réduite, type cisaillement, en alliage d’aluminium 7050, revêtement de conversion - Série en inches

Le présent document spécifie les caractéristiques des rivets de précision, à bague sertie, à tête fraisée 100° réduite, type cisaillement, en alliage d’aluminium 7050-T73, à film sec, série en inches, avec une température maximale d'utilisation de 80 °C pour les applications aérospatiales.

Aeronavtika - Zatič, ozka toleranca, pritrdilni, 100° ugrezna glava, strižni tip, iz aluminijeve zlitine 7050, konverzijska prevleka - Palčne mere

General Information

Status
Published
Publication Date
23-Dec-2025
ICS
49.030.60 - Rivets
 
49.060 - Aerospace electric equipment and systems
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
24-Dec-2025
Completion Date
24-Dec-2025
Ref Project
SIST EN 6050:2026 - Aerospace series - Pin, close tolerance, swage locking, 100° countersunk reduced head, shear type, in aluminium alloy 7050, conversion coating - Inch series

Overview

EN 6050:2025 is a European standard developed by CEN specifying the requirements for aerospace series pins designed for critical fastening applications. These pins feature close tolerance, swage locking, and a 100° countersunk reduced head in a shear-type configuration. Manufactured from aluminium alloy 7050-T73 with a chemical conversion coating, the standard covers inch series pins suitable for aerospace environments with operating temperatures up to 80 °C. The specification ensures high mechanical performance, dimensional accuracy, and corrosion resistance for aerospace assemblies.

Key Topics

  • Pin Configuration and Dimensions
    EN 6050 defines precise geometric parameters, tolerances, and mass for pins, crucial for aerospace component compatibility. Dimensions are expressed in millimeters, covering diameter codes 040 and 050 among others, with requirements for grip length, shank straightness, and head profile. The pins feature a 100° countersunk reduced head designed to minimize aerodynamic drag and fit flush surfaces.

  • Material and Surface Treatment
    The pins are made from aluminium alloy 7050-T73, recognized for its high strength and corrosion resistance, making it ideal for aerospace structures. A chemical film conversion coating described in MIL-C-5541E is applied to enhance surface protection. Additionally, cetyl alcohol lubrication per MIL-L-87132B ensures reliable swage locking and long-term durability.

  • Mechanical Properties
    Mechanical performance criteria include minimum shear strength (283 MPa to 324 MPa), ultimate tensile strength, and preload values tailored for aerospace demands. These properties guarantee secure mechanical locking and resistance against shear forces encountered during operation.

  • Pin Versions and Marking
    The standard accommodates variations such as pins with a sealant escape groove or “pull-type” pintails for installation flexibility. Marking conforms to EN 2424 standards, ensuring traceability with identification marks depressingly engraved up to 0.15 mm depth.

  • Quality Management and Compliance
    Manufacturers must operate under approved aerospace quality management systems like EN 9100. Qualification follows rigorous procedures (e.g., EN 9133) to verify product conformity. Compliance with ATA iSpec 2200 facilitates standardized part numbering for aerospace supply chains.

Applications

EN 6050 pins are specifically designed for aerospace industry applications where precision fastening and shear resistance are critical. Common usage includes:

  • Airframe structural assemblies
  • Control surface attachments
  • Aerospace engine components requiring close tolerance fasteners
  • Lightweight aerospace subassemblies where aluminium alloy fasteners are preferred
  • Situations demanding corrosion-resistant, chemically treated pins with excellent fatigue properties

The pins’ swage locking mechanism ensures secure, vibration-resistant assemblies suitable for harsh aviation environments. Their reduced head design supports flush surface installations, instrumental in aerodynamic optimization.

Related Standards

EN 6050:2025 is part of a series of aerospace standards governing fastener components:

  • EN 6051 – Aerospace series collars, swage locking, shear type, aluminium alloy 3003, conversion coating, inch series
  • EN 6052 – Aerospace rivet-collar system, aluminium alloy, shear type, inch series technical specification
  • EN 6054 – Aerospace collars, swage locking, shear type, aluminium alloy 6061, conversion coating, inch series
  • EN 9100 – Quality management systems – Requirements for aviation, space, and defense
  • EN 9133 – Aerospace series – Qualification procedure for standard products
  • MIL-C-5541E – Chemical conversion coatings on aluminium and aluminium alloys
  • MIL-L-87132B – Lubricant (Cetyl alcohol) application to fasteners

These interconnected standards create a robust framework ensuring the reliability, traceability, and performance of aerospace fasteners across the supply chain.

Keywords: Aerospace pins, close tolerance pins, swage locking, 100° countersunk head, aluminium alloy 7050, chemical film coating, shear type pins, aerospace fasteners, EN 6050, aerospace component standards, inch series fasteners, aerospace quality management

Frequently Asked Questions

EN 6050:2025 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Pin, close tolerance, swage locking, 100° countersunk reduced head, shear type, in aluminium alloy 7050, conversion coating - Inch series". This standard covers: This document specifies the characteristics of close tolerance pins, swage locking, 100° countersunk reduced head, shear type, in aluminium alloy 7050-T73 with chemical film, inch series, with a maximum operating temperature of 80 °C for aerospace application.

This document specifies the characteristics of close tolerance pins, swage locking, 100° countersunk reduced head, shear type, in aluminium alloy 7050-T73 with chemical film, inch series, with a maximum operating temperature of 80 °C for aerospace application.

EN 6050:2025 is classified under the following ICS (International Classification for Standards) categories: 49.030.60 - Rivets; 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 6050:2025 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-februar-2026
Aeronavtika - Zatič, ozka toleranca, pritrdilni, 100° ugrezna glava, strižni tip, iz
aluminijeve zlitine 7050, konverzijska prevleka - Palčne mere
Aerospace series - Pin, close tolerance, swage locking, 100° countersunk reduced head,
shear type, in aluminium alloy 7050, conversion coating - Inch series
Luft- und Raumfahrt - Passniete für Quetschverriegelung mit reduziertem Senkkopf 100°,
für Scherbeanspruchung, aus Aluminiumlegierung 7050, Schmierfilm behandelt - Zoll-
Reihe
Série aérospatiale - Rivets de précision, boulon serti, à tête fraisée 100° réduite,
cisaillement-type, en alliage d’aluminium 7050, film sec - Série en inches
Ta slovenski standard je istoveten z: EN 6050:2025
ICS:
49.025.20 Aluminij Aluminium
49.030.40 Zatiči, žeblji Pins, nails
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 6050
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2025
EUROPÄISCHE NORM
ICS 49.030.60
English Version
Aerospace series - Pin, close tolerance, swage locking, 100°
countersunk reduced head, shear type, in aluminium alloy
7050, conversion coating - Inch series
Série aérospatiale - Rivet de précision, à bague sertie, à Luft- und Raumfahrt - Passniete für
tête fraisée 100° réduite, type cisaillement, en alliage Quetschverriegelung mit reduziertem Senkkopf 100°,
d'aluminium 7050, revêtement de conversion - Série für Scherbeanspruchung, aus Aluminiumlegierung
en inches 7050, Schmierfilm behandelt - Zoll-Reihe
This European Standard was approved by CEN on 26 October 2025.

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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 6050:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Requirements . 5
4.1 Configuration, dimensions, tolerances and mass. 5
4.2 Material and surface treatment . 6
4.3 Mechanical properties . 7
4.4 Pin version. 7
5 Designation . 8
6 Marking . 8
7 Technical specification . 8
8 Example of installation . 8
9 Quality management system . 9
Bibliography . 10

European foreword
This document (EN 6050:2025) has been prepared by 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 June 2026, and conflicting national standards shall be
withdrawn at the latest by June 2026.
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 specifies the characteristics of close tolerance pins, swage locking, 100° countersunk
reduced head, shear type, in aluminium alloy 7050-T73 with chemical film, inch series, with a maximum
operating temperature of 80 °C for aerospace applications.
2 Normative references
The following do
...

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