SIST EN 2546:2009

Aerospace series - Washers, lock with radial serrations in corrosion resisting steel passivated for flight control rods - Dimensions

This standard specifies the characteristics of lock washers in corrosion resisting steel, with radial serrations primarily intended for flight control rods.
These lock washers are intended to immobilise the rod end in relation to the rod body, whilst allowing a precise positional adjustment.

Luft- und Raumfahrt - Sicherungen, radialverzahnt aus korrosionsbeständigem Stahl, passiviert für Bediengestänge von Flugsteuerungen - Maße

Diese Norm legt die Eigenschaften von radialen verzahnten Sicherungsscheiben aus korrosionsbeständigem Stahl fest, die vor allem für das Bediengestänge von Flugsteuerungen bestimmt sind.
Diese Sicherungsscheiben dienen dazu, den Stangenkopf gegenüber dem Stangenkörper zu arretieren und gleichzeitig eine genaue Lageeinstellung zu ermöglichen.

Série aérospatiale - Freins à stries radiales en acier résistant à la corrosion passivés pour bielles de commandes de vol - Dimensions

Aeronavtika - Zaščitne podložke, radialno ozobljene, iz korozijsko odpornega jekla, pasivirane, za kontrolne palice pri krmiljenju - Mere

General Information

• Status: Published
• Publication Date: 15-Mar-2009
• ICS: 49.030.50 - Washers and other locking elements
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-Jan-2009
• Due Date: 26-Mar-2009
• Completion Date: 16-Mar-2009
• Ref Project: EN 2546:2006 - Aerospace series - Washers, lock with radial serrations in corrosion resisting steel passivated for flight control rods - Dimensions

Relations

• Replaces: SIST EN 2546:2001/AC1:2001 - Aerospace series - Washers, lock with radial serrations in corrosion resisting steel - Dimensions
• Effective Date: 01-Apr-2009
• Replaces: SIST EN 2546:2001 - Aerospace series - Washers, lock with radial serrations in corrosion resisting steel - Dimensions
• Effective Date: 01-Apr-2009
• Refers: SIST EN 9133:2018 - Aerospace series - Quality Management Systems - Qualification Procedure for Aerospace Standard Products
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2516:2024 - Aerospace series - Passivation of corrosion resisting steels and decontamination of nickel or cobalt base alloys
• Effective Date: 28-Jan-2026

Overview

SIST EN 2546:2009 is a European standard specifying the characteristics and dimensions of lock washers made from corrosion resisting steel with radial serrations. These washers are designed for use in aerospace applications, particularly for flight control rods, to secure the rod end to the rod body while still permitting precise positional adjustments. The standard ensures that such lock washers meet quality and performance requirements suitable for critical aerospace environments where safety, reliability, and corrosion resistance are essential.

Key Topics

• Aerospace Lock Washers: Details the design and application of washers with radial serrations, primarily intended as locking elements in flight control assemblies.
• Material Specification: Lock washers are manufactured from corrosion resisting steel, ensuring durability and resistance to harsh aerospace environments, with mandatory passivation treatment in accordance with EN 2516 for enhanced corrosion resistance.
• Dimensional Requirements: The standard defines detailed dimensions, tolerances, and mass of the washers to guarantee consistent fit and performance in rod assemblies.
• Surface Finish: Requirements for surface roughness help prevent damage to associated aerospace components.
• Identification and Marking: Provides guidelines for the indelible marking of each washer and packaging, ensuring traceability and compliance with aerospace quality management procedures.
• Qualification: Compliance with EN 9133 for qualification procedures applied to aerospace standard parts.

Applications

The primary application of washers specified in SIST EN 2546:2009 is within:

• Flight Control Rod Assemblies: Used to immobilize and secure the rod end in relation to the rod body in critical aerospace flight control systems while permitting fine positional adjustment.
• Aerospace Manufacturing and Maintenance: Essential in both the assembly of new aircraft components and the maintenance or replacement of parts in existing aircraft.
• Environments Demanding Corrosion Resistance: The use of corrosion resisting steel and mandatory passivation treatment makes these lock washers suitable for applications exposed to moisture, varying temperatures, and other corrosive conditions typical in aviation.

By adopting this standard, aerospace manufacturers and maintenance providers ensure component reliability, ease of integration, safety compliance, and facilitate interoperability across products and suppliers in the aerospace sector.

Related Standards

Compliance with SIST EN 2546:2009 often involves considering several associated aerospace standards, including:

• EN 2516: Aerospace series - Passivation of corrosion resisting steels and decontamination of nickel base alloys.
• EN 2538: Aerospace series - Steel FE-PM3801 (X5CrNiCu17-4) - Specifications for sheet and strip materials.
• EN 2540: Aerospace series - Steel FE-PM3902 (X7CrNiAl17-7) - Sheet and strip materials specification.
• EN 9133: Aerospace series - Quality management systems - Qualification procedure for aerospace standard parts.

These standards provide guidelines on material composition, processing, testing, and quality assurance, ensuring that all aerospace components-including lock washers-meet stringent industry requirements for safety and performance.

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By adhering to SIST EN 2546:2009, organizations in the aerospace industry benefit from harmonized requirements, reliable component performance, and improved safety for flight control rod assemblies. For optimal results, always refer to the latest editions of relevant standards and consult with materials and quality experts during the selection and application of aerospace lock washers.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2009
1DGRPHãþD
SIST EN 2546:2001
SIST EN 2546:2001/AC1:2001
$HURQDYWLND=DãþLWQHSRGORåNHUDGLDOQRR]REOMHQHL]NRUR]LMVNRRGSRUQHJDMHNOD
SDVLYLUDQH]DNRQWUROQHSDOLFHSULNUPLOMHQMX0HUH
Aerospace series - Washers, lock with radial serrations in corrosion resisting steel
passivated for flight control rods - Dimensions
Luft- und Raumfahrt - Sicherungen, radialverzahnt aus korrosionsbeständigem Stahl,
passiviert für Bediengestänge von Flugsteuerungen - Maße
Série aérospatiale - Freins à stries radiales en acier résistant à la corrosion passivés
pour bielles de commandes de vol - Dimensions
Ta slovenski standard je istoveten z: EN 2546:2006
ICS:
49.030.50 Podložke in drugi blokirni Washers and other locking
elementi elements
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 2546
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2006
ICS 49.030.50 Supersedes EN 2546:1988
English Version
Aerospace series - Washers, lock with radial serrations in
corrosion resisting steel passivated for flight control rods -
Dimensions
Série aérospatiale - Freins à stries radiales en acier Luft- und Raumfahrt - Sicherungen, radialverzahnt aus
résistant à la corrosion passivés pour bielles de korrosionsbeständigem Stahl, passiviert für
commandes de vol - Dimensions Bediengestänge von Flugsteuerungen - Maße
This European Standard was approved by CEN on 26 October 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2546:2006: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope.4
2 Normative references.4
3 Required characteristics.4
4 Designation.6
5 Marking.7
6 Qualification.7

Foreword
This European Standard (EN 2546:2006) has been prepared by the European Association of Aerospace
Manufacturers - Standardization (AECMA-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
AECMA, 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 November 2006, and conflicti
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