kSIST FprEN 6051:2025

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: Not Published
• Public Enquiry End Date: 25-Apr-2023
• ICS: 49.030.99 - Other fasteners
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 08-Aug-2025
• Due Date: 26-Sep-2025
• Completion Date: 08-Aug-2025
• Ref Project: EN 6051:2025 - Aerospace series - Collar, swage locking, shear type, in aluminium alloy 3003, conversion coating - Inch series

Overview

kSIST FprEN 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.

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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.

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 6051:2023
01-april-2023
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: prEN 6051
ICS:
49.030.99 Drugi vezni elementi Other fasteners
oSIST prEN 6051:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 6051:2023
oSIST prEN 6051:2023
DRAFT
EUROPEAN STANDARD
prEN 6051
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2023
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 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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 6051:2023 E
worldwide for CEN national Members.

oSIST prEN 6051:2023
prEN 6051:2023 (E)
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

oSIST prEN 6051:2023
prEN 6051:2023 (E)
European foreword
This document (prEN 6051:2023) 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, thi
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