EN 6090:2016

Aerospace series - Washer, retaining

This standard specifies the dimensions, tolerances, required characteristics and mass of a retaining washer for use in fuselage interior equipment and structural applications.

Luft- und Raumfahrt - Sicherungsscheibe

Série aérospatiale - Rondelle frein

Aeronavtika - Podložke, zadrževalne

Ta standard določa dimenzije, tolerance, zahtevane lastnosti in maso zadrževalnih podložk za uporabo v notranji opremi v trupu letala ter konstrukcijsko uporabo.

General Information

• Status: Published
• Publication Date: 30-Aug-2016
• Withdrawal Date: 27-Feb-2017
• ICS: 49.030.50 - Washers and other locking elements
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3 - Mechanical
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 31-Aug-2016
• Completion Date: 31-Aug-2016
• Ref Project: SIST EN 6090:2016 - Aerospace series - Washer, retaining

Overview

EN 6090:2016 is a European Standard developed by CEN under the Aerospace and Defence Industries Association of Europe (ASD-STAN). It specifies the dimensions, tolerances, required characteristics, and mass of retaining washers used primarily in fuselage interior equipment and structural aerospace applications. This standard ensures uniformity, quality, and safety for retaining washers within the aerospace sector across multiple European member countries.

The standard covers configuration, material specifications, surface treatments, operating temperature ranges, marking, and designation rules, providing a comprehensive technical reference for manufacturers, suppliers, and engineers in the aerospace industry.

Key Topics

• Dimensions and Tolerances
  EN 6090:2016 strictly defines dimensional parameters and tolerances for retaining washers, including diameters, thickness, and angles for four designated types (A, B, C, D). Measurements are specified in millimeters with defined tolerance classes (ISO 2768-m) to ensure precision and interchangeability.

• Material Specifications and Surface Treatments
  The standard mandates corrosion-resistant steel as the base material. Surface treatments include passivation treatments compliant with SAE AMS 2700 or EN 2516 standards, ensuring resistance to corrosion and extended service life in harsh aerospace environments.

• Operating Temperature Range
  Retaining washers must perform reliably within temperatures from -55 °C to 150 °C, accommodating typical aerospace environmental extremes.

• Marking and Designation
  Marking follows EN 2424 (style G), facilitating traceability and quality control. The designation system supports clear identification of washer types and specifications to streamline procurement and inventory management.

• Compatibility and Reference to Other Standards
  EN 6090:2016 cross-references related aerospace standards such as EN 6095 (rotary fasteners), EN 10151 (stainless steel for springs), and others in the retaining and fastening product family.

Applications

EN 6090:2016 retaining washers are critical components used in:

• Fuselage Interior Equipment
  Securing assemblies that demand strict weight and dimensional controls to maintain structural integrity while reducing overall mass.

• Structural Aerospace Components
  Load-bearing and vibration-resistant fastening elements in aircraft construction, ensuring safety and durability under operational stresses.

• Aerospace Manufacturing and Maintenance
  Standardized washers streamline assembly processes, reduce errors, and simplify replacement procedures during aircraft maintenance cycles.

These washers support aerospace manufacturers and maintenance organizations in meeting rigorous safety standards and operational performance requirements.

Related Standards

• EN 2424 - Aerospace series, marking of aerospace products
• EN 2516 - Passivation of corrosion-resistant steels and nickel base alloys
• EN 6095 - Aerospace series, rotary fasteners for structural and non-structural applications
• EN 10151 - Stainless steel strip for springs, technical delivery conditions
• SAE AMS 2700 - Passivation of corrosion-resistant steels

Additionally, EN 6090 references other aerospace standards concerning washers, studs, and fastening systems, forming an integrated framework for aerospace hardware specifications.

---

Keywords: EN 6090:2016, aerospace retaining washer, fuselage interior equipment, retaining washer dimensions, corrosion-resistant steel, aerospace fasteners, SAE AMS 2700 passivation, aerospace structural components, aerospace fastening standards, CEN aerospace standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2016
Aeronavtika - Podložke, zadrževalne
Aerospace series - Washer, retaining
Luft- und Raumfahrt - Sicherungsscheibe
Série aérospatiale - Rondelle frein
Ta slovenski standard je istoveten z: EN 6090:2016
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.

EN 6090
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2016
EUROPÄISCHE NORM
ICS 49.030.50
English Version
Aerospace series - Washer, retaining
Série aérospatiale - Rondelle frein Luft- und Raumfahrt - Sicherungsscheibe
This European Standard was approved by CEN on 11 March 2016.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 6090:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Requirements . 4
4 Designation . 8
5 Marking . 8
6 Technical specification . 8
Bibliography . 9

European foreword
This document (EN 6090:2016) 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 Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
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 February 2017, and conflicting national standards shall be
withdrawn at the latest by February 2017.
Attention is drawn to the possibility that some of the ele
...