kSIST FprEN 6050:2025

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 - Rivets de précision, boulon serti, à tête fraisée 100° réduite, cisaillement-type, en alliage d’aluminium 7050, film sec - 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, prevleke - Palčne mere

General Information

• Status: Not Published
• Public Enquiry End Date: 06-Jun-2023
• ICS: 49.025.20 - Aluminium
• ICS: 49.030.40 - Pins, nails
• ICS: 49.030.60 - Rivets
• ICS: 49.060 - Aerospace electric equipment and systems
• 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 6050:2025 - Aerospace series - Pin, close tolerance, swage locking, 100° countersunk reduced head, shear type, in aluminium alloy 7050, conversion coating - Inch series

Overview

kSIST FprEN 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

kSIST FprEN 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.

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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

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 6050:2023
01-maj-2023
Aeronavtika - Zatič, ozka toleranca, pritrdilni, 100° ugrezna glava, strižni tip, iz
aluminijeve zlitine 7050, prevleke - 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: prEN 6050
ICS:
49.025.20 Aluminij Aluminium
49.030.40 Zatiči, žeblji Pins, nails
oSIST prEN 6050:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 6050:2023
oSIST prEN 6050:2023
DRAFT
EUROPEAN STANDARD
prEN 6050
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2023
ICS 49.060
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 - Rivets de précision, boulon serti, à Luft- und Raumfahrt - Passniete für
tête fraisée 100° réduite, cisaillement-type, en alliage Quetschverriegelung mit reduziertem Senkkopf 100°,
d'aluminium 7050, film sec - Série en inches für Scherbeanspruchung, aus Aluminiumlegierung
7050, 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 6050:2023 E
worldwide for CEN national Members.

oSIST prEN 6050:2023
prEN 6050:2023 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Requirements . 4
4.1 Configuration, dimensions, tolerances and mass. 4
4.2 Material and surface treatment . 6
4.3 Mechanical properties . 6
4.4 Pin version. 7
5 Designation . 7
6 Marking . 7
7 Technical specification . 7
8 Example of installation . 7
9 Quality Management System . 8
Bibliography . 9

oSIST prEN 6050:2023
prEN 6050:2023 (E)
European foreword
This document (prEN 6050:2023) 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, 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 document is currently submitted to the CEN Enquiry.
oSIST prEN 6050:2023
prEN 6050:2023(E)
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 application.
2 Normative references
The following documents are
...