Aerospace series - Collar, swage locking, shear type, in aluminium alloy 3003, conversion coating - Inch series

This document specifies the characteristics of a collar, swage locking, shear type, in aluminium alloy 3003, with a maximum operating temperature of 80 °C for aerospace application. This document is applicable in combination with EN 6050, EN 6100 or EN 6120.

Luft- und Raumfahrt - Schließring für Quetschverriegelung, für Scherbeanspruchung, aus Aluminiumlegierung 3003, Schmierfilm behandelt - Zoll-Reihe

No Scope available

Série aérospatiale - Bague à sertir, type cisaillement, en alliage d’aluminium 3003, revêtement de conversion - Série en inches

Le présent document spécifie les caractéristiques d’une bague à sertir, de type cisaillement, en alliage d’aluminium 3003, avec une température maximale d'utilisation de 80 °C pour les applications aérospatiales. Ce document est applicable conjointement avec l’EN 6050, l’EN 6100 ou l’EN 6120.

Aeronavtika - Pritrdilni obroči, strižni tip, iz aluminijeve zlitine 3003, prevleke - Palčne mere

General Information

Status
Published
Publication Date
23-Dec-2025
ICS
49.030.99 - Other fasteners
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 6051:2026 - Aerospace series - Collar, swage locking, shear type, in aluminium alloy 3003, conversion coating - Inch series

Overview

EN 6051:2025 is a European aerospace standard specifying the characteristics of collars used in swage locking shear-type fasteners made from aluminium alloy 3003 with a conversion coating. Designed for aerospace applications, these collars operate effectively up to a maximum temperature of 80 °C. EN 6051 complements related standards EN 6050, EN 6100, and EN 6120, providing comprehensive guidelines for inch-series fasteners. The standard ensures high reliability, dimensional accuracy, and material integrity for critical fastening components utilized in aviation and space industries.

Key Topics

  • Material Specification
    The collars are manufactured from aluminium alloy 3003, known for its ductility and corrosion resistance. Surface treatment includes a chemical conversion coating adhering to MIL-C-5541 standards and lubrication with cetyl alcohol as per MIL-L-87132, ensuring longevity and environmental protection.

  • Design & Dimensions
    EN 6051 details exact configuration, dimensional tolerances, and mass, including maximum burr allowances, ensuring interchangeability and precise fit in aerospace assemblies. Dimensions are provided in millimetres (metric) despite the inch series designation to ensure manufacturing consistency.

  • Marking and Identification
    Collars must be marked following EN 2424 regulations, utilizing depressed markings (up to 0.25 mm deep) for traceability without compromising structural integrity. This supports quality assurance and lifecycle tracking in aerospace components.

  • Installation Example
    The standard outlines the installation method complying with related pins from EN 6050, EN 6100, or EN 6120, illustrating proper assembly to achieve the required shear strength and locking mechanism functionality.

  • Quality Management
    Suppliers must operate under a certified aerospace quality management system such as EN 9100 or equivalent, ensuring manufacturing processes meet stringent aerospace industry requirements. Qualification procedures should align with EN 9133 guidelines or mutually agreed standards between stakeholders.

Applications

EN 6051 collars are critical components in aerospace fastener assemblies where swage locking and shear type locking mechanisms are necessary. Typical applications include:

  • Structural aircraft assemblies requiring secure fastener retention under shear loads.
  • Aerospace mechanisms exposed to temperatures up to 80 °C.
  • Components needing corrosion-resistant fasteners with reliable locking actions.
  • Replacement or maintenance parts complying with established aerospace fastener series and standards.

This standard supports manufacturers, suppliers, and quality inspectors in maintaining consistent product quality, enhancing safety, and ensuring regulatory compliance in aerospace fastener systems.

Related Standards

EN 6051 should be used in conjunction with several complementary standards within the aerospace fastener category:

  • EN 6050 – Specifications for aluminium alloy 7050 pins with close tolerances.
  • EN 6100 – Shear-type pins with chemical film coatings.
  • EN 6120 – Protruding head pins used in swage locking assemblies.
  • EN 2424 – Aerospace marking requirements for parts.
  • EN 9100 – Quality management system requirements for aviation, space, and defence organizations.
  • EN 9133 – Qualification procedures for aerospace standard products.

These linked standards collectively ensure a holistic approach to aerospace fastener systems, offering detailed guidance on pin and collar compatibility, quality management, and performance verification.

Keywords: EN 6051, aerospace collar, swage locking, shear type fastener, aluminium alloy 3003, aerospace standard, conversion coating, inch series fastener, aerospace fasteners, aerospace quality management, EN 9100, aerospace applications, pin and collar system.

Frequently Asked Questions

EN 6051:2025 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Collar, swage locking, shear type, in aluminium alloy 3003, conversion coating - Inch series". This standard covers: This document specifies the characteristics of a collar, swage locking, shear type, in aluminium alloy 3003, with a maximum operating temperature of 80 °C for aerospace application. This document is applicable in combination with EN 6050, EN 6100 or EN 6120.

This document specifies the characteristics of a collar, swage locking, shear type, in aluminium alloy 3003, with a maximum operating temperature of 80 °C for aerospace application. This document is applicable in combination with EN 6050, EN 6100 or EN 6120.

EN 6051:2025 is classified under the following ICS (International Classification for Standards) categories: 49.030.99 - Other fasteners. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 6051:2025 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 - Pritrdilni obroči, strižni tip, iz aluminijeve zlitine 3003, prevleke -
Palčne mere
Aerospace series - Collar, swage locking, shear type, in aluminium alloy 3003,
conversion coating - Inch series
Luft- und Raumfahrt - Schließring für Quetschverriegelung, für Scherbeanspruchung,
aus Aluminiumlegierung 3003, Schmierfilm behandelt - Zoll-Reihe
Série aérospatiale - Bague à sertir, type cisaillement, en alliage d’aluminium 3003,
revêtement de conversion - Série en inches
Ta slovenski standard je istoveten z: EN 6051:2025
ICS:
49.025.20 Aluminij Aluminium
49.030.99 Drugi vezni elementi Other fasteners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 6051
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2025
EUROPÄISCHE NORM
ICS 49.030.99
English Version
Aerospace series - Collar, swage locking, shear type, in
aluminium alloy 3003, conversion coating - Inch series
Série aérospatiale - Bague à sertir, type cisaillement, en Luft- und Raumfahrt - Schließring für
alliage d'aluminium 3003, revêtement de conversion - Quetschverriegelung, für Scherbeanspruchung, aus
Série en inches Aluminiumlegierung 3003, 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 6051:2025 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
5 Designation . 6
6 Marking . 6
7 Technical specification . 6
8 Example of installation . 7
9 Quality management system . 7
Bibliography . 8

European foreword
This document (EN 6051:2025) 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 comple
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