prEN 2328

• Abstract:

  This document specifies the characteristics of tab washers for flight control rods.; These tab washers are intended to immobilise the rod end in relation to the rod body, whilst allowing a; positional adjustment of 1/2 a turn.

• Status: Not Published
• Publication Date: 01-Feb-2028
• ICS: 49.030.50 - Washers and other locking elements
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3/S 1 - Parts of Mechanical Systems
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 06-Aug-2026
• Completion Date: 06-Aug-2026
• Ref Project: oSIST prEN 2328:2026 - Aerospace series - Washer, tab in corrosion resisting steel, cadmium plated for flight control rods - Dimensions

• Revises: EN 2328:2006 - Aerospace series - Washers, tab in corrosion resisting steel, cadmium plated for flight control rods - Dimensions
• Effective Date: 23-Jul-2025

Overview

prEN 2328, developed by the European Committee for Standardization (CEN), specifies the characteristics and dimensions of tab washers made from corrosion-resisting steel with cadmium plating, specifically designed for use on flight control rods in aerospace applications. These critical mechanical components are intended to immobilize the rod end in relation to the rod body while permitting a positional adjustment of half a turn, ensuring both security and functionality for flight-critical control systems.

The standard supersedes EN 2328:2006 and introduces updates, including a new annex with bending test procedures and installation examples. This draft European standard is essential for aerospace manufacturers, maintenance organizations, and suppliers seeking compliance with current industry requirements for flight control rod components.

Keywords: prEN 2328, aerospace tab washer, corrosion resistant, cadmium plated, flight control rods, CEN standard, locking washer, mechanical fasteners.

Key Topics

• Dimensional Specifications: prEN 2328 defines the precise measurements and allowable tolerances for tab washers after cadmium plating, ensuring interchangeability and compatibility in aerospace assembly.
• Material and Coating: Washers are produced from high-quality corrosion-resistant steel and feature a cadmium plating, enhancing durability and resistance to harsh environments common in aerospace settings.
• Functional Requirements: The tab washer's design allows secure immobilization but maintains the possibility for positional adjustment of ½ turn, supporting both stability and necessary flexibility in flight control rod installations.
• Inspection and Testing: Visual inspection criteria are specified to ensure tab washers are free from burrs, scratches, and cracks, while a bend test verifies the component’s reliability after repeated deformation.
• Marking and Traceability: Each washer and its packaging must carry distinctive and indelible markings, aiding quality control, traceability, and parts management.
• Quality Assurance: Manufacturers must operate under an approved aerospace quality management system, such as EN 9100, with documented qualification procedures ensuring consistent product performance.

Applications

• Flight Control Rod Assemblies: Tab washers per prEN 2328 are used as locking elements in the assembly of flight control rods, providing secure attachment of movable rod ends while accommodating necessary adjustments during installation or maintenance.
• Aircraft Manufacturing and Maintenance: This standard is essential for OEMs and maintenance, repair, and overhaul (MRO) organizations working within the aerospace sector, assuring compliance with the latest industry requirements.
• Enhancing Operational Safety: By specifying corrosion-resistant materials and robust testing requirements, prEN 2328 helps mitigate risks associated with mechanical failure, supporting long-term airworthiness and safety.
• Quality and Regulatory Compliance: Airlines and suppliers benefit from following prEN 2328 to achieve and demonstrate conformity with European and global aerospace standards, facilitating market access and regulatory approval.

Related Standards

• EN 2133: Aerospace series - specifies requirements for cadmium plating of steels, copper, and nickel alloys, underpinning the surface treatment defined in prEN 2328.
• ISO 3574: Defines cold-reduced carbon steel sheet properties used for the raw material in tab washer production.
• EN 9100: Quality Management Systems standard for aviation, space, and defense, required for manufacturers producing aerospace components.
• EN 9133: Details procedures for the qualification of aerospace standard products, supporting quality assurance activities referenced in prEN 2328.

By adhering to prEN 2328 and its related standards, aerospace organizations ensure the mechanical integrity and reliability of flight control systems, supporting safety, compliance, and the advancement of aerospace engineering best practices.

SLOVENSKI STANDARD
01-oktober-2026
Aeronavtika - Podložke z zavihkom, iz korozijsko odpornega jekla, s kadmijevo
prevleko, za kontrolne palice pri krmiljenju - Mere
Aerospace series - Washer, tab in corrosion resisting steel, cadmium plated for flight
control rods - Dimensions
Luft- und Raumfahrt - Sicherungsblech aus korrosionsbeständigem Stahl, verkadmet, für
Bediengestänge von Flugsteuerungen - Maße
Série aérospatiale - Frein d’écrou en acier résistant à la corrosion cadmié, pour bielles
de commandes de vol - Dimensions
Ta slovenski standard je istoveten z: prEN 2328
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2026
ICS 49.030.50 Will supersede EN 2328:2006
English Version
Aerospace series - Washer, tab in corrosion resisting steel,
cadmium plated for flight control rods - Dimensions
Série aérospatiale - Frein d'écrou en acier résistant à la Luft- und Raumfahrt - Sicherungsblech aus
corrosion cadmié, pour bielles de commandes de vol - korrosionsbeständigem Stahl, verkadmet, für
Dimensions Bediengestänge von Flugsteuerungen - Maße
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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 2328:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 4
4.1 Dimensions – Mass . 4
4.2 Surface roughness . 4
4.3 Material . 4
4.4 Surface treatment . 4
5 Designation . 5
6 Marking . 6
7 Inspections and tests . 6
7.1 Appearance . 6
7.2 Bend test .
...