SIST EN 4673-002:2010
(Main)Aerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 002: Design standard
Aerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 002: Design standard
This European Standard specifies the applications and installation hole dimensions for EN standard, self-locking, self broaching key, UNJ threads inserts and provisions for component salvage, for aerospace applications.
Luft- und Raumfahrt - Gewindeeinsätze, UNJ-Gewinden, selbstsichernd, mit selbsträumenden Stiften - Teil 002: Konstruktionsnorm
Diese Norm legt die Anwendungen und die Einbaulochmaße nach der EN-Norm von selbstsichernden
Gewindeeinsätzen, UNJ-Gewinde und mit selbsträumenden Stiften zur Verwendung in der Luft- und
Raumfahrt fest.
Série aérospatiale - Douilles filetées, à filetage UNJ, à freinage interne, à clavettes auto-brochantes - Partie 002 : Norme de conception
Aeronavtika - Vložki, navoj UNJ, samozapiralni, s samozagozdnim ključem - 002. del: Standard za projektiranje
Ta standard določa uporabo in namestitev dimenzije lukenj za EN standard, samozapiralnega, samozagozdnega ključa in vložkov z navojem MJ ter določbe za reševanje sestavnih delov, za uporabo v aeronavtiki.
General Information
- Status
- Published
- Publication Date
- 13-Sep-2010
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Sep-2010
- Due Date
- 06-Nov-2010
- Completion Date
- 14-Sep-2010
Overview
SIST EN 4673-002:2010 is a European standard under the Aerospace series developed by CEN, specifying the design requirements for inserts featuring UNJ threads that are self-locking and equipped with self-broaching keys. These inserts are intended primarily for aerospace applications, providing detailed guidance on installation hole dimensions, applications, and provisions for component salvage in aerospace components.
The standard ensures compatibility with UNJ threaded bolts per ISO 3161 and defines performance and installation criteria to maintain mechanical integrity and durability critical in aerospace environments.
Key Topics
Design Specifications
Defines installation hole dimensions, flange thickness requirements, and tool clearance considerations specific to self-locking, self-broaching key UNJ threaded inserts. Includes codified hole dimensions for normal and repair sizes, enabling standardized component design and repair processes.Self-Locking Mechanism
Inserts include self-broaching keys that cut into the parent thread during installation to secure the insert, preventing movement during bolt mounting/unmounting. The self-locking feature operates independently from the key side, ensuring reliable fixation.Performance Requirements
Ensures minimum reusability of the inserts: at least 25 re-installations at ambient temperature and 5 cycles post high-temperature baking, with specified self-locking torque parameters aligned with insert size.Installation and Use Restrictions
Specifies tolerances for flush or near-flush insert installation within components (0.25 mm to 0.75 mm below surface), including maximum allowable clearance diameters for items passed through the inserts. It also defines limitations to avoid interference during assembly.Component Salvage Provisions
Provides guidance for repair scenarios, encouraging salvage practices for expensive aerospace parts through recommended hole preparation and selection of repair-size inserts. Addresses economic considerations of salvage versus replacement.Designation and Drawing Standards
Outlines naming conventions for inserts based on diameter and repair size, and presents recommended methods for indicating installation holes on technical drawings, including codification and full dimensioning methods.
Applications
The SIST EN 4673-002:2010 standard is essential for aerospace engineers, designers, and manufacturers working with threaded inserts in:
Aircraft structural components
Where high-strength, reusable threaded connections are required under demanding load and temperature conditions.Engine assemblies and mounting points
Supporting reliable bolt retention and ease of component repair through standardized insert dimensions and installation protocols.Aerospace repair and maintenance
Facilitating component salvage via defined repair insert sizes and installation practices, reducing costs associated with component replacement.Lightweight alloys and high-performance materials
Including aluminum, titanium, and heat-resistant steels, where thread reinforcements via inserts prolong service life and improve reliability.
Related Standards
EN 4673-001: Installation and removal procedure
Covers step-by-step instructions for installing and removing inserts defined in EN 4673 series.EN 4673-003: Technical specification
Details the technical requirements and tolerances concerning the inserts’ manufacture and performance.ISO 3161: Aerospace – UNJ threads – General requirements
Specifies general dimensions and limits for UNJ threads, ensuring compatibility across aerospace threaded components.
Keywords: aerospace threaded inserts, UNJ threads, self-locking inserts, self-broaching keys, aerospace fasteners, aerospace repair inserts, aerospace design standards, EN 4673-002, aerospace component salvage, bolt thread inserts, CEN aerospace standards.
Frequently Asked Questions
SIST EN 4673-002:2010 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 002: Design standard". This standard covers: This European Standard specifies the applications and installation hole dimensions for EN standard, self-locking, self broaching key, UNJ threads inserts and provisions for component salvage, for aerospace applications.
This European Standard specifies the applications and installation hole dimensions for EN standard, self-locking, self broaching key, UNJ threads inserts and provisions for component salvage, for aerospace applications.
SIST EN 4673-002:2010 is classified under the following ICS (International Classification for Standards) categories: 49.030.30 - Nuts. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 4673-002:2010 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.Luft- und Raumfahrt - Gewindeeinsätze, UNJ-Gewinden, selbstsichernd, mit selbsträumenden Stiften - Teil 002: KonstruktionsnormSérie aérospatiale - Douilles filetées, à filetage UNJ, à freinage interne, à clavettes auto-brochantes - Partie 002 : Norme de conceptionAerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 002: Design standard49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 4673-002:2010SIST EN 4673-002:2010en01-oktober-2010SIST EN 4673-002:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4673-002
August 2010 ICS 49.030.30 English Version
Aerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 002: Design standard
Série aérospatiale - Douilles filetées, à filetage UNJ, à freinage interne, à clavettes auto-brochantes - Partie 002: Norme de conception
Luft- und Raumfahrt - Gewindeeinsätze, UNJ-Gewinden, selbstsichernd, mit selbsträumenden Stiften - Teil 002: Konstruktionsnorm This European Standard was approved by CEN on 12 June 2010.
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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4673-002:2010: ESIST EN 4673-002:2010
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