Aerospace series - Washers, wire locking, in corrosion resisting steel, passivated

This standard specifies the characteristics of wire locking washers, in corrosion resisting steel, passivated, for aerospace applications.

Luft- und Raumfahrt - Sicherungsbleche, aus korrosionsbeständigem Stahl, passiviert

Diese Norm legt die Eigenschaften von Sicherungsblechen aus korrosionsbeständigem Stahl, passiviert, für die Anwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Pattes d'ancrage, en acier résistant a la corrosion, passivées

La présente norme spécifie les caractéristiques des pattes d'ancrage, en acier résistant à la corrosion, passivées, pour applications aérospatiales.

Aerospace series - Washers, wire locking, in corrosion resisting steel, passivated

General Information

Status
Published
Publication Date
31-Dec-2000
ICS
49.030.50 - Washers and other locking elements
Technical Committee
SS SPL - Technical Board for the general field
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jan-2001
Due Date
01-Jan-2001
Completion Date
01-Jan-2001
Ref Project
EN 2949:1996 - Aerospace series - Washers, wire locking, in corrosion resisting steel, passivated

Overview

EN 2949:1996 is a CEN aerospace series standard that specifies the characteristics of wire locking washers made from corrosion resisting steel, passivated, intended for aerospace applications. The document defines the expected material condition and surface treatment and sets out the required characteristics so these locking washers perform reliably in aircraft and space hardware.

Key Topics

The standard addresses technical topics and requirements such as:

  • Material specification - use of corrosion resisting stainless steel suitable for aerospace environments.
  • Surface treatment - requirement for passivation to improve corrosion resistance and reduce free iron on the surface.
  • Functional characteristics - geometry and features that provide a positive locking action to prevent fastener loosening under vibration and dynamic loading.
  • Dimensional and form characteristics - general guidance on washer form and interface with mating fasteners (nuts, bolts, studs).
  • Performance expectations - intended locking effectiveness and durability in service conditions typical of aerospace use.
  • Inspection and conformity - criteria for visual and dimensional inspection to confirm washers meet intended characteristics.

Note: EN 2949:1996 specifies the general characteristics and acceptance criteria. For precise dimensions, mechanical values, or test methods, users should consult the full standard text or complementary fastener standards.

Applications

Typical practical applications include:

  • Locking of bolted joints in aircraft structures, engine components, avionics housings, and other assemblies where vibration and dynamic loads risk fastener loosening.
  • Use in new aircraft manufacturing, overhaul, repair and maintenance (MRO), and component supply chains requiring aerospace-grade locking elements.
  • Selection by design engineers specifying anti-rotation or locking features without resorting to adhesives or secondary locking devices.

Who Uses This Standard

  • Aerospace design and structural engineers specifying fasteners and locking elements.
  • Fastener manufacturers producing stainless steel wire locking washers to aerospace requirements.
  • Quality assurance and procurement teams ensuring purchased washers conform to aerospace standards.
  • Maintenance, Repair & Overhaul (MRO) organizations applying correct locking hardware during repairs.

Related Standards

  • Other CEN/ISO standards covering fasteners, washers, locking devices, and corrosion-resistant materials may be used alongside EN 2949:1996 to define detailed dimensions, testing methods, or material grades.

EN 2949:1996 is a practical reference when specifying or procuring wire locking washers for reliable, corrosion-resistant locking in aerospace assemblies.

Frequently Asked Questions

SIST EN 2949:2001 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Washers, wire locking, in corrosion resisting steel, passivated". This standard covers: This standard specifies the characteristics of wire locking washers, in corrosion resisting steel, passivated, for aerospace applications.

This standard specifies the characteristics of wire locking washers, in corrosion resisting steel, passivated, for aerospace applications.

SIST EN 2949:2001 is classified under the following ICS (International Classification for Standards) categories: 49.030.50 - Washers and other locking elements. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 2949:2001 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Washers, wire locking, in corrosion resisting steel, passivatedLuft- und Raumfahrt - Sicherungsbleche, aus korrosionsbeständigem Stahl, passiviertSérie aérospatiale - Pattes d'ancrage, en acier résistant a la corrosion, passivéesAerospace series - Washer
...

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