SIST EN 4673-001:2010
(Main)Aerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 001: Installation and removal procedure
Aerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 001: Installation and removal procedure
This European Standard specifies the installation and removal procedure (hole profile, tools) of self-locking, self broaching key, UNJ thread inserts defined by EN standards, for aerospace applications.
Luft- und Raumfahrt - Gewindeeinsätze, UNJ-Gewinden, selbstsichernd, mit selbsträumenden Stiften - Teil 001: Ein- und Ausbauverfahren
Diese Norm legt das Ein- und Ausbauverfahren (Lochprofil, Werkzeuge) von selbstsichernden Gewindeeinsätzen
mit UNJ-Gewinden und mit selbsträumenden Stiften nach EN-Normen zur Verwendung in der
Luft-und Raumfahrt fest.
Série aérospatiale - Douilles filetées, à filetage UNJ, à freinage interne, à clavettes auto-brochantes - Partie 001 : Procédure d'installation et d'extraction
Aeronavtika - Vložki, navoj UNJ, samozapiralni, s samozagozdnim ključem - 001. del: Postopek namestitve in odstranitve
Ta standard določa postopek namestitve in odstranitve (profili lukenj, orodja) samozapiralnega samozagozdnega ključa in vložkov z navojem MJ, opredeljenih z EN standardi, 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
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
SIST EN 4673-001:2010 is a European Standard developed by CEN within the aerospace series, specifying the proper installation and removal procedures for self-locking, self-broaching key, UNJ thread inserts as defined by EN standards. This standard is essential for ensuring the reliability, safety, and performance of threaded fastener systems in aerospace components, guiding users with detailed requirements for hole profiles, appropriate tool usage, inspection, and maintenance.
UNJ thread inserts with self-locking and self-broaching keys are widely used in aerospace structures to reinforce or repair threads, enhance load distribution, and resist vibration-induced loosening. Proper handling following SIST EN 4673-001:2010 extends the service life of components and maintains structural integrity in critical applications.
Key Topics
- Scope and Purpose: Outlines the objective to standardize installation and removal methods for self-locking, self-broaching key inserts with UNJ threads, specifically for aerospace environments.
- Insert Types: Covers different sizes and repair variants (normal, first repair, second repair) ensuring compatibility with a range of bolt threads and tapped holes according to related EN standards and ISO 3161.
- Installation Procedures: Details both hand installation and pneumatic (air pressure) installation, specifying the lubrication requirements and steps for successful broaching and seating of keys.
- Inspection Requirements: Emphasizes pre-installation checks for component cleanliness, correct hole dimensions, and post-installation verification of insert position, broaching depth, and minimum self-locking torque.
- Insert Removal and Repair: Provides a structured process for safe removal of damaged or worn inserts and guidance for repair or replacement using progressively larger inserts if required.
Applications
SIST EN 4673-001:2010 applies primarily to aerospace manufacturing, maintenance, repair, and overhaul (MRO) settings, and for operators handling threaded assemblies in aircraft and spacecraft. Its practical applications include:
- Thread Reinforcement: Enabling the use of inserts in soft materials or thin-walled components to prevent thread stripping and improve durability.
- Component Repair: Facilitating straightforward, standardized insert removal and replacement procedures to maintain or restore threaded joints without compromising surrounding materials.
- Vibration Resistance: Ensuring self-locking features reduce loosening due to vibration, which is critical in high-stress aerospace environments.
- Corrosion Mitigation: Outlining correct lubricant and compound use, particularly for inserts installed in dissimilar metals like aluminium or magnesium alloys, to minimize galvanic corrosion risks.
Organizations following SIST EN 4673-001:2010 benefit from improved safety, reduced risk of assembly damage, and consistent quality across installations, leading to lower maintenance costs and more reliable operations.
Related Standards
SIST EN 4673-001:2010 operates within an extensive framework of aerospace fastener and insert standards. Relevant documents include:
- EN 4673-002: Aerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 002: Design standard
- EN 4673-004: Part 004 detailing inserts made from heat-resisting nickel base alloy Ni-P100HT (Inconel 718), silver plated
- EN 4673-005: Inserts in nickel base alloy WASPALOY, silver plated
- EN 4673-006: Inserts in heat-resisting steel FE-PA2601 (A286), MoS₂ coated
- ISO 3161: UNJ threads - General requirements and limit dimensions
These references ensure full compatibility and interoperability across insert types, component materials, and threaded assembly requirements in aerospace applications.
Keywords: SIST EN 4673-001:2010, aerospace series, UNJ thread inserts, self-locking inserts, self-broaching keys, installation procedure, removal procedure, thread reinforcement, aerospace fastener standards, CEN, maintenance and repair, vibration resistance.
Get Certified
Connect with accredited certification bodies for this standard
BUREAU VERITAS Certification Germany
Bureau Veritas certification in Germany.
Element Materials Technology
Materials testing and product certification.
AQMS Ltd.
AQMS provides ISO certification to SMEs across the UK.
Sponsored listings
Frequently Asked Questions
SIST EN 4673-001:2010 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 001: Installation and removal procedure". This standard covers: This European Standard specifies the installation and removal procedure (hole profile, tools) of self-locking, self broaching key, UNJ thread inserts defined by EN standards, for aerospace applications.
This European Standard specifies the installation and removal procedure (hole profile, tools) of self-locking, self broaching key, UNJ thread inserts defined by EN standards, for aerospace applications.
SIST EN 4673-001:2010 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 4673-001:2010 has the following relationships with other standards: It is inter standard links to SIST EN 10244-1:2009, SIST EN 4673-004:2010, SIST EN 4673-006:2010, SIST EN 4673-002:2010, SIST EN 4673-005:2010, SIST EN 4673-003:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 4673-001:2010 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 001: Ein- und AusbauverfahrenSérie aérospatiale - Douilles filetées, à filetage UNJ, à freinage interne, à clavettes auto-brochantes - Partie 001 : Procédure d'installation et d'extractionAerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 001: Installation and removal procedure49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 4673-001:2010SIST EN 4673-001:2010en01-oktober-2010SIST EN 4673-001:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4673-001
August 2010 ICS 49.030.30 English Version
Aerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 001: Installation and removal procedure
Série aérospatiale - Douilles filetées, à filetage UNJ, à freinage interne, à clavettes auto-brochantes - Partie 001: Procédure d'installation et d'extraction
Luft- und Raumfahrt - Gewindeeinsätze, UNJ-Gewinden, selbstsichernd, mit selbsträumenden Stiften - Teil 001: Ein-und Ausbauverfahren 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 4673-001:2010: ESIST EN 4673-001:2010
EN 4673-004, Aerospace series — Inserts, UNJ threads, self-locking, with self-broaching keys — Part 004: In heat resisting nickel base alloy Ni-P100HT (Inconel 718), silver plating EN 4673-005, Aerospace series — Inserts, UNJ threads, self-locking, with self-broaching keys — Part 005: In heat resisting nickel base alloy Ni-P101HT (WASPALOY), silver plating
EN 4673-006, Aerospace series — Inserts, UNJ threads, self-locking, with self-broaching keys — Part 006: In heat resisting steel FE-PA2601 (A286), MoS2 coated ISO 3161, Aerospace series — UNJ threads — General requirements and limit dimensions 3 Insert information Tables 1 to 3 provide the cross reference between the insert codification, the related bolt thread and the tapped hole diameter. SIST EN 4673-001:2010
Tapped hole diameter a
Tapped hole reference a
EN 4673-004-3-0 EN 4673-005-3-0 EN 4673-006-3-0 .190 0-32UNJF .312 5-18UNJC-3B EN 4673-002-3-0 EN 4673-004-4-0 EN 4673-005-4-0 EN 4673-006-4-0 .250 0-28UNJF .375 0-16UNJFC-3B EN 4673-002-4-0 EN 4673-004-5-0 EN 4673-005-5-0 EN 4673-006-5-0 .312 5-24UNJF .437 5-16UNJ-3B EN 4673-002-5-0 EN 4673-004-6-0 EN 4673-005-6-0 EN 4673-006-6-0 .375 0-24UNJF .500 0-16UNJ-3B EN 4673-002-6-0 EN 4673-004-7-0 EN 4673-005-7-0 EN 4673-006-7-0 .437 5-20UNJF .562 5-16UNJ-3B EN 4673-002-7-0 EN 4673-004-8-0 EN 4673-005-8-0 EN 4673-006-8-0 .500 0-20UNJF .625 0-16UNJ-3B EN 4673-002-8-0 a According to ISO 3161.
Table 2 — First repair size insert Insert reference Bolt thread diameter a
Tapped hole diameter a
Tapped hole reference a
EN 4673-004-3-1 EN 4673-005-3-1 EN 4673-006-3-1 .190 0-32UNJF .375 0-16UNJC-3B EN 4673-002-3-1 EN 4673-004-4-1 EN 4673-005-4-1 EN 4673-006-4-1 .250 0-28UNJF .437 5-16UNJ-3B EN 4673-002-4-1 EN 4
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...