SIST EN 4354:2009

Aerospace series - Six lobe recess - Drivers, relieved

This standard specifies the characteristics of drivers, relieved, six lobe recess, for aerospace applications.

Luft- und Raumfahrt - Sechs-Bogenzahn, Innenantrieb - Schraubendrehereinsätze, mit Außensechskant und Ringnut

Diese Norm legt die Anforderungen für Sechs-Bogenzahn-Schraubendrehereinsätze, Innenantrieb, mit Außensechskant und Ringnut zur Verwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Empreinte six lobes - Embout de tournevis hexagonal, à gorge

Aeronavtika - Šestzoba vdolbina, notranji pogon - Nastavki za izvijače z zunanjo šestrobo obliko in krožnim utorom

General Information

• Status: Published
• Publication Date: 02-Apr-2009
• ICS: 49.030.99 - Other fasteners
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 20-Mar-2009
• Due Date: 25-May-2009
• Completion Date: 03-Apr-2009
• Ref Project: EN 4354:2006 - Aerospace series - Six lobe recess - Drivers, relieved

Overview

EN 4354:2006 - Aerospace series - Six lobe recess - Drivers, relieved is a CEN standard prepared by ASD‑STAN that defines the required characteristics for relieved drivers with a six‑lobe (Torx‑style) recess used in aerospace applications. The standard specifies configuration, dimensions, tolerances and marking conventions for these drivers and references related normative documents for drive ends, technical specification and product marking. Dimensions and tolerances are provided in millimetres (with some inch equivalents) via figures and tables in the standard.

Key topics

• Scope and intent: Specifies the characteristics of relieved six‑lobe drivers intended for aerospace use (recess codes cover sizes typically listed in the tables).
• Dimensions & tolerances: Detailed geometry for driver body, retaining groove and driver tip are given in Figures 1–3 and Tables 1–3; all dimensions and tolerances are metric unless otherwise noted.
• Drive end standardization: Hexagon drive ends follow ISO 1173 requirements for hand‑ and machine‑operated screwdriver bits and connecting parts.
• Materials: Material quality is left to the manufacturer’s option but must comply with the requirements of EN 4359 (technical specification for six‑lobe drivers).
• Marking & designation: Marking follows EN 2424 (style A) and the document provides a standardized designation format (example: EN4354‑55C) for product identification.
• Normative references: The standard relies on ISO 1173, EN 2424 and EN 4359 for related requirements and testing.
• Administrative notes: Approved by CEN in 2006; adoption and national implementation details and patent considerations are noted in the foreword.

Applications

• Aerospace fastener tooling and maintenance: ensures interchangeability and correct fit between drivers and six‑lobe fasteners used on aircraft structures and systems.
• Tool manufacturers: guides design and production of relieved six‑lobe driver bits and inserts to meet aerospace quality and dimensional criteria.
• Procurement and quality assurance: provides clear acceptance criteria and marking requirements for purchasing and inspection of drivers for aviation use.
• Aircraft MRO and assembly operations: aids selection of the correct driver sizes and designs to reduce fastener damage and ensure reliable torque application.

Related standards

• ISO 1173 - Drive ends for screwdriver bits and connecting parts (dimensions, torque testing)
• EN 4359 - Aerospace series - Six lobe recess - Drivers - Technical specification
• EN 2424 - Aerospace series - Marking of aerospace products

EN 4354:2006 is a practical reference for engineers, toolmakers, procurement specialists and quality teams working with aerospace fasteners and tooling that require standardized six‑lobe relieved drivers.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Sechs-Bogenzahn, Innenantrieb - Schraubendrehereinsätze, mit Außensechskant und RingnutSérie aérospatiale - Empreinte six lobes - Embout de tournevis hexagonal, à gorgeAerospace series - Six lobe recess - Drivers, relieved49.030.99Drugi vezni elementiOther fastenersICS:Ta slovenski standard je istoveten z:EN 4354:2006SIST EN 4354:2009en,de01-maj-2009SIST EN 4354:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4354December 2006ICS 49.030.99 English VersionAerospace series - Six lobe recess - Drivers, relievedSérie aérospatiale - Empreinte six lobes - Embout detournevis hexagonal, à gorgeLuft- und Raumfahrt - Sechs-Bogenzahn, Innenantrieb -Schraubendrehereinsätze, mit Außensechskant undRingnutThis European Standard was approved by CEN on 28 August 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4354:2006: ESIST EN 4354:2009
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