SIST EN 4357:2009

• Abstract:

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

• 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 4357:2006 - Aerospace series - Six lobe recess - Drivers, handle

• Refers: SIST EN 4359:2009 - Aerospace series - Six lobe recess - Drivers - Technical specification
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026

SIST EN 4357:2009 is the Slovenian adoption of EN 4357:2006 from CEN for aerospace applications. It specifies the characteristics of drivers, handle, six lobe recess, so manufacturers, buyers and inspectors can identify the correct tool type, size and marking.

What does SIST EN 4357:2009 specify?

SIST EN 4357:2009 specifies the characteristics of drivers, handle, six lobe recess, for aerospace applications. The document covers how these drivers are configured, how they are designated, how they are marked, and which technical specification they must meet.

The standard is organised into six clauses:

• Scope
• Normative references
• Required characteristics
• Designation
• Marking
• Technical specification

Clause 3 uses Figures 1 and 2 and Table 1 to define the product layout and size data. Clause 4 gives the naming format, and Clause 5 points to the marking method.

What are the key requirements of SIST EN 4357:2009?

SIST EN 4357:2009 focuses on a small set of practical requirements that control the tool's form, size, identification and conformity. For a user or buyer, the important point is that the driver is not just named by type - it is tied to a recess code, a defined geometry and a related technical specification.

Configuration, dimensions, tolerances and masses

Clause 3.1 states that the configuration, dimensions, tolerances and masses are defined by Figures 1 and 2 and Table 1. Dimensions and tolerances are given in millimetres. In practice, this is what a manufacturer measures and what an inspector checks against the specified recess code.

Material quality

Clause 3.2 leaves the material quality to the manufacturer's option, but the material still has to meet EN 4359. This means the maker may choose the material, but not the performance basis - the material choice must still satisfy the linked technical specification.

Recess code and size selection

Table 1 assigns driver dimensions to recess codes. The codes run through the six lobe recess size range, so the user can specify the required driver by code rather than by free text. In practice, this helps procurement and tool control systems order and verify the correct size.

Designation format

Clause 4 defines a designation with a description block and an identity block. The example shows how the recess code is built into the identity, and the note states that code I9005 is inserted between the blocks if needed. This matters because catalogues, drawings and purchase orders can use one consistent naming pattern.

Marking

Clause 5 requires marking in accordance with EN 2424, style A, as shown in Figure 1. For users, this means the tool should carry a standardised identification mark, which supports traceability and visual checking in workshop or inspection use.

Technical specification link

Clause 6 points to EN 4359. That link is important because SIST EN 4357:2009 defines the handle driver characteristics, while EN 4359 supplies the technical specification the product has to meet.

What terms does SIST EN 4357:2009 define?

• Driver - the hand tool defined by the standard for engaging a six lobe recess fastener.
• Handle - the part of the driver held by the user; Figure 1 allows the handle shape to be at the manufacturer's option.
• Six lobe recess - the fastener recess type the driver is made for.
• Recess code - the size identifier used in Table 1 and in the designation example.
• Designation - the structured name made from a description block and an identity block.
• Marking - the identification applied to the driver in accordance with EN 2424, style A.
• Technical specification - the referenced requirement set in EN 4359 that the material and product must meet.

Who uses SIST EN 4357:2009?

SIST EN 4357:2009 is used by aerospace manufacturers and their suppliers who design or make hand drivers for six lobe recess fasteners. It is also used by quality and inspection staff who need to check dimensions, marking and designation against a common rule. Buyers and production engineers use it when they need to order or specify the driver by recess code and technical reference.

What changed in SIST EN 4357:2009 from the previous edition?

SIST EN 4357:2009 is the Slovenian standard identical to EN 4357:2006. The document shown here is the 2006 European Standard adopted as SIST in 2009.

Which standards are used with SIST EN 4357:2009?

• EN 2424 - provides the marking style used for the driver.
• EN 4359 - provides the technical specification that the material quality must meet.

What does the SIST EN 4357:2009 document contain?

The document contains two figures and one table that define the driver configuration, tip configuration and size data. Table 1 links recess codes to driver dimensions, so it is the main source for selection and inspection. Clause 4 gives an example designation format, which helps users build consistent part names and order descriptions. Clause 5 ties marking to EN 2424 style A, and Clause 6 points to EN 4359 for the technical specification.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.ORPLuft- und Raumfahrt - Sechs-Bogenzahn, Innenantrieb - SchraubendreherSérie aérospatiale - Empreinte six lobes - TournevisAerospace series - Six lobe recess - Drivers, handle49.030.99Drugi vezni elementiOther fastenersICS:Ta slovenski standard je istoveten z:EN 4357:2006SIST EN 4357:2009en,de01-maj-2009SIST EN 4357:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4357December 2006ICS 49.030.99 English VersionAerospace series - Six lobe recess - Drivers, handleSérie aérospatiale - Empreinte six lobes - TournevisLuft- und Raumfahrt - Sechs-Bogenzahn, Innenantrieb -Schraubendreher für SchraubenThis 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 4357:2006: ESIST EN 4357:2009
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