SIST EN 4619:2010

• Abstract:

  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.

• Status: Published
• Publication Date: 08-Apr-2010
• ICS: 49.030.30 - Nuts
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 22-Mar-2010
• Due Date: 27-May-2010
• Completion Date: 09-Apr-2010
• Ref Project: EN 4619:2010 - Aerospace series - Inserts, MJ threads, self-locking, with self-broaching keys - Installation and removal procedure

• Refers: SIST EN 840-6:2004+A1:2008 - Mobile waste containers - Part 6: Safety and health requirements
• Effective Date: 28-Jan-2026
• Refers: SIST EN 13848-1:2004+A1:2008 - Railway applications - Track - Track geometry quality - Part 1: Characterisation of track geometry
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4621:2010 - Aerospace series - Inserts, MJ threads, self-locking, self-broaching keys - Technical specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4624:2010 - Aerospace series - Inserts, MJ threads, self-locking, with self-broaching keys, in heat resisting nickel base alloy NI-PH1302 (Waspaloy), silver plate
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4622:2010 - Aerospace series - Inserts, MJ threads, self-locking, with self-broaching keys, in heat resisting steel FE-PA2601 (A286), MoS2 coated
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4623:2010 - Aerospace series - Inserts, MJ threads, self-locking, with self-broaching keys, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), silver plated
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4620:2010 - Aerospace series - Inserts, MJ threads, self-locking, with self-broaching keys - Design standard
• Effective Date: 28-Jan-2026

SIST EN 4619:2010 is the Slovenian adoption of EN 4619:2010, prepared by ASD-STAN and published through CEN (European Committee for Standardization). It specifies how to install and remove self-locking MJ thread inserts with self-broaching keys for aerospace applications. The document covers hole profile, tools, inspection checks, minimum self-locking torque, and replacement steps.

What does SIST EN 4619:2010 specify?

SIST EN 4619:2010 specifies the installation and removal procedure for self-locking, self-broaching key, MJ thread inserts defined by EN standards for aerospace use. In practice, it tells the installer how to prepare the hole, choose the tool, check the fitted insert, and remove or repair it later.

The document is organized into clauses on insert information, pre-installation inspection, installation tools, position and broaching checks, self-locking torque inspection, and insert replacement.

Clause	What it covers
3	Insert information and cross-references between insert reference, bolt thread, and tapped hole
4	Inspection before installation
5	Installation tools and hand/air-pressure installation
6	Checks of insert position and keys broaching
7	Minimum self-locking torque inspection
8	Insert removal and repair

What are the key requirements of SIST EN 4619:2010?

Select the correct insert and hole

Clause 3 links each insert reference to the related bolt thread and tapped hole diameter in Tables 1 to 3, with Table 4 giving the special MJS13×1 limits. This matters because the insert, the bolt thread, and the prepared hole must match before assembly starts.

Prepare the parts before installation

Clause 4 requires the installation hole to be free from burrs, foreign objects, grease, and oil, and the insert itself to be clean and free from protective grease. That basic cleaning step reduces the risk of thread damage and poor seating.

Use the proper tool and installation method

Clause 5 says to use the appropriate tool for each insert reference, and it warns that the tools and methods shown are basic principles rather than mandatory designs. The practical point is that the tool must achieve correct installation without damaging the threads or the locking zone.

Clause 5 separates hand installation from air-pressure installation. Hand installation uses a combined screwing and broaching tool, while the air-pressure method uses a gun-mounted tool that screws, broaches, and then unscrews automatically. In both cases, the insert is lubricated as specified on the assembly drawing, and aluminium or magnesium components may need an external compound to limit galvanic corrosion.

Check insert position and broaching

Clause 6 requires an inspection gauge common to all insert dimensions to verify the insert depth and the key installation depth. After broaching, the component surface must not show distortion or cracks. This is the acceptance check that confirms the insert sits correctly and the keys have been set properly.

Verify minimum self-locking torque

Clause 7 requires the installed insert to meet the minimum self-locking torque in Table 6. The check uses a low third pitch diameter passivated stainless steel test bolt without lubrication, and the installer is responsible for the test sample size and frequency. Worn or damaged test bolts are not to be used.

Remove and replace inserts safely

Clause 8 gives the removal sequence: locally machine or drill the key area if needed, deflect the keys inward, unscrew the insert with the extraction tool, and remove any remaining fragments. After removal, the tapped hole is checked with a threaded plug gauge. If the hole is sound, a new insert of the same part number may be fitted; otherwise, a first or second repair size insert may be used when the design allows.

What terms does SIST EN 4619:2010 define?

• MJ threads - The aerospace thread form used for the insert and bolt thread references in this standard.
• Self-locking torque - The minimum torque needed to turn the installed insert, used as a retention check.
• Self-broaching keys - Keys that are set into the component during installation to lock the insert.
• Tapped hole - The threaded hole in the component that receives the insert.
• Repair size insert - An oversize insert used after removal when the original hole must be repaired.
• Threaded plug gauge - A gauge used after removal to check the tapped hole dimensions.

Who uses SIST EN 4619:2010?

SIST EN 4619:2010 is used by aerospace design engineers, assembly technicians, maintenance and repair organizations, and quality inspectors. It also helps tooling suppliers and buyers because it ties the insert reference to the hole preparation, installation tool, inspection checks, and repair approach.

Which standards are used with SIST EN 4619:2010?

• EN 4620 - The design standard for the insert family; it is the main companion document for choosing the insert and judging whether repair is possible.
• EN 4622 - A material and coating variant of the self-broaching-key insert in heat resisting steel.
• EN 4623 - A material and coating variant of the self-broaching-key insert in heat resisting nickel base alloy.
• EN 4624 - Another material and coating variant of the self-broaching-key insert in heat resisting nickel base alloy.
• ISO 5855-1 - Gives the general requirements for MJ threads.
• ISO 5855-2 - Gives the limit dimensions for bolts and nuts used with MJ threads.

What does the SIST EN 4619:2010 document contain?

The document contains the installation and removal procedures, the pre-installation inspection steps, and the tool guidance for both hand and air-pressure installation. It also includes cross-reference tables for insert references, repair sizes, and tapped hole sizes, plus the special dimensions for MJS13×1.

It provides figures for the installation tools, the position checks, and the removal sequence. It also includes a torque-check table and a removal table that support inspection, assembly control, and repair work.

SLOVENSKI STANDARD
01-maj-2010
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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).
...