EN 4619:2010
(Main)Aerospace series - Inserts, MJ threads, self-locking, with self-broaching keys - Installation and removal procedure
Aerospace series - Inserts, MJ threads, self-locking, with self-broaching keys - Installation and removal procedure
This standard specifies the installation and removal procedure (hole profile, tools) of self-locking, self broaching key, MJ thread inserts defined by EN standards, for aerospace applications.
Luft- und Raumfahrt - Gewindeeinsätze, MJ-Gewinden, selbstsichernd, mit selbsträumenden Stiften - Ein- und Ausbauverfahren
Diese Norm legt das Ein- und Ausbauverfahren (Lochprofil, Werkzeuge) von selbstsichernden Gewindeeinsätzen
mit MJ-Gewinden und mit selbsträumenden Stiften nach EN-Normen zur Verwendung in der Luftund
Raumfahrt fest.
Série aérospatiale - Douilles filetées, à filetage MJ, à freinage interne, à clavettes auto-brochants - Procédure d'installation et d'extraction
Aeronavtika - Vložki, navoj MJ, samozapiralni, s samozagozdnim ključem - 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
- 16-Mar-2010
- Withdrawal Date
- 29-Sep-2010
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 17-Mar-2010
- Completion Date
- 17-Mar-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
- Effective Date
- 28-Jan-2026
Overview
EN 4619:2010 (CEN) defines the installation and removal procedure for self-locking MJ thread inserts with self-broaching keys used in aerospace applications. The standard complements the design and material standards (see Related Standards) and focuses on practical assembly, inspection and repair methods to ensure reliable, repeatable performance of inserts installed in aircraft and aerospace components.
Key Topics
- Scope and purpose: specifies hole profile, tooling and step-by-step methods for both installation and removal of MJ inserts intended for aerospace use.
- Installation methods: detailed procedures for both hand installation and pneumatic (air pressure) installation including lubrication, screwing, broaching of keys and final position checks.
- Inspection requirements: pre-installation checks of hole cleanliness and insert condition; post-installation checks of insert depth and key broach position (dimensional checks referenced to the standard's figures).
- Functional verification: minimum self-locking torque inspection using specified test bolts and the requirement for periodic verification by the installer.
- Removal and repair: controlled removal techniques (drilling, milling/grinding, deflecting keys, extraction tool) and rules for re‑installation using original or first/second repair size inserts.
EN 4619 highlights the need to use a dedicated installation tool per insert reference and warns that tool design must not damage threads or locking zones.
Applications
- Aerospace component assembly where MJ thread inserts provide robust threaded joints in thin-walled or soft alloys.
- Maintenance, repair and overhaul (MRO) operations requiring controlled removal and repair of damaged threaded holes.
- Production lines where consistent broaching and seating of self-locking inserts are required with documented inspection records.
Benefits realized by applying EN 4619 procedures:
- Consistent, secure fit of inserts and keys to prevent loosening in service.
- Reduced risk of component damage through controlled tooling and dimensional limits.
- Clear repair path with defined first- and second-repair sizes when original threads are damaged.
- Repeatable inspection criteria for torque and position to support quality assurance.
Related Standards
EN 4619 references and works alongside related EN and ISO documents that define insert design, materials and MJ thread limits, including:
- EN 4620 - design standard for MJ thread inserts
- EN 4622 / EN 4623 / EN 4624 - material and finish variants of MJ inserts
- ISO 5855-1 / ISO 5855-2 - MJ thread general requirements and limit dimensions
Follow EN 4619:2010 as part of an integrated aerospace fastening strategy to ensure correct installation, reliable self-locking performance and an auditable repair route for MJ thread inserts.
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Frequently Asked Questions
EN 4619:2010 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Inserts, MJ threads, self-locking, with self-broaching keys - Installation and removal procedure". This standard covers: This standard specifies the installation and removal procedure (hole profile, tools) of self-locking, self broaching key, MJ thread inserts defined by EN standards, for aerospace applications.
This standard specifies the installation and removal procedure (hole profile, tools) of self-locking, self broaching key, MJ thread inserts defined by EN standards, for aerospace applications.
EN 4619:2010 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.
EN 4619:2010 has the following relationships with other standards: It is inter standard links to EN 840-6:2004+A1:2008, EN 13848-1:2003+A1:2008, EN 4622:2010, EN 4623:2010, EN 4624:2010, EN 4620:2010, EN 4621:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 4619:2010 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)
SLOVENSKI STANDARD
01-maj-2010
$HURQDYWLND9ORåNLQDYRM0-VDPR]DSLUDOQLVVDPR]DJR]GQLPNOMXþHP
3RVWRSHNQDPHVWLWYHLQRGVWUDQLWYH
Aerospace series - Inserts, MJ threads, self-locking, with self-broaching keys -
Installation and removal procedure
Luft- und Raumfahrt - Gewindeeinsätze, MJ-Gewinden, selbstsichernd, mit
selbsträumenden Stiften - Ein- und Ausbauverfahren
Série aérospatiale - Douilles filetées, à filetage MJ, à freinage interne, à clavettes auto-
brochants - Procédure d'installation et d'extraction
Ta slovenski standard je istoveten z: EN 4619:2010
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 4619
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2010
ICS 49.030.30
English Version
Aerospace series - Inserts, MJ threads, self-locking, with self-
broaching keys - Installation and removal procedure
Série aérospatiale - Douilles filetées, à filetage MJ, à Luft- und Raumfahrt - Gewindeeinsätze, MJ-Gewinden,
freinage interne, à clavettes auto-brochants - Procédure selbstsichernd, mit selbsträumenden Stiften - Ein- und
d'installation et d'extraction Ausbauverfahren
This European Standard was approved by CEN on 9 January 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 Ref. No. EN 4619:2010: E
worldwide for CEN national Members.
Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Insert information .4
4 Inspection requirements before installation .6
5 Installation tools .6
5.1 General .6
5.2 Hand installation .7
5.3 Air pressure installation .8
6 Checks of insert position and keys broaching .9
7 Inspection of minimum self-locking torque . 10
8 Insert replacement . 10
8.1 Insert removal . 10
8.2 Repair . 12
Foreword
This document (EN 4619:2010) has been prepared by the Aerospace and Defence Industries Association of
Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2010, and conflicting national standards shall be
withdrawn at the latest by September 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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 the United Kingdom.
1 Scope
This standard specifies the installation and removal procedure (hole profile, tools) of self-locking,
self-broaching key, MJ thread inserts defined by EN standards, for aerospace applications.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 4620, Aerospace series — Inserts, MJ threads, self-locking, with self-broaching keys — Design standard
EN 4622, Aerospace series — Inserts, MJ threads, self-locking, with self-broaching keys, in heat resisting
steel FE-PA2601 (A286), MoS coated
EN 4623, Aerospace series — Inserts, MJ threads, self-locking, with self-broaching keys, in heat resisting
nickel base alloy NI-PH2601 (Inconel 718), silver plated
EN 4624, Aerospace series — Inserts, MJ threads, self-locking, with self-broaching keys, in heat resisting
nickel base alloy NI-PH1302 (Waspaloy), silver plate
ISO 5855-1, Aerospace — MJ threads — Part 1: General requirements
ISO 5855-2, Aerospace — MJ threads — Part 2: Limit dimensions for bolts and nuts
3 Insert information
Tables 1 to 3 provide the cross reference between the insert codification, the related bolt thread and the
tapped hole diameter.
Table 1 — Normal size insert
Bolt thread Tapped hole Tapped hole
Insert reference
a, b b
reference
diameter diameter
EN 4622-050-0
EN 4624-050-0 EN 4620-050-0
MJ5×0,8 MJ9×1-4H5H
EN 4623-050-0
EN 4622-060-0
EN 4624-060-0 EN 4620-060-0
MJ6×1 MJ10×1-4H5H
EN 4623-060-0
EN 4622-070-0
EN 4624-070-0 MJ7×1 MJ11×1-4H5H EN 4620-070-0
EN 4623-070-0
EN 4622-080-0
EN 4624-080-0 MJ8×1 MJ12×1-4H5H EN 4620-080-0
EN 4623-080-0
EN 4622-100-0
EN 4624-100-0 EN 4620-100-0
MJ10×1,25 MJ14×1-4H5H
EN 4623-100-0
a
According to ISO 5855-2.
b
According to ISO 5855-1.
Table 2 — First repair size insert
Bolt thread Tapped hole Tapped hole
Insert reference
a, b b
reference
diameter diameter
EN 4622-050-1
EN 4624-050-1 EN 4620-050-1
MJ5×0,8 MJ10×1-4H5H
EN 4623-050-1
EN 4622-060-1
EN 4624-060-1 EN 4620-060-1
MJ6×1 MJ11×1-4H5H
EN 4623-060-1
EN 4622-070-1
EN 4624-070-1 EN 4620-070-1
MJ7×1 MJ12×1-4H5H
EN 4623-070-1
EN 4622-080-1
EN 4624-080-1 EN 4620-080-1
MJ8×1 MJS13×1-4H5H
EN 4623-080-1
EN 4622-100-1
EN 4624-100-1 EN 4620-100-1
MJ10×1,25 MJ15×1-4H5H
EN 4623-100-1
a
According to ISO 5855-2.
b
According to ISO 5855-1 except MJS13×1 (see Table 4).
...
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