EN 4673-004:2010
(Main)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
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
This European Standard specifies the characteristics of self-locking, inserts for Inch series, self-broaching keys, in NI P100HT, silver plated, for aerospace applications.
Classification: 1 270 MPa ) / 600 °C )
Luft- und Raumfahrt - Gewindeeinsätze, UNJ-Gewinde, selbstsichernd, mit selbsträumenden Stiften - Teil 004: Aus hochwarmfester Nickellegierung NI-P100HT (Inconel 718), versilbert
Diese Norm legt die Eigenschaften von selbstsichernden Gewindeeinsätzen für Inch-Reihen aus NI-P100HT,
versilbert und mit selbsträumenden Stiften für Anwendungen in der Luft- und Raumfahrt fest.
Klasse: 1 270 MPa1) / 600 °C2)
Série aérospatiale - Douilles filetées, à filetage UNJ, à freinage interne, à clavettes auto-brochantes - Partie 004: En alliage résistant à chaud base nickel NI-P100HT (Inconel 718), argentage
Aeronavtika - Vložki, navoj UNJ, samozapiralni, s samozagozdnim ključem - 004. del: Iz toplotnoodporne zlitine na nikljevi osnovi NI-P100HT (Inconel 718), posrebreni
Ta standard opredeljuje značilnosti samozapiralnih vložkov z MJ navojem, s samozagozdnimi ključi, iz NI-PH2601, posrebrenih, za uporabo v aeronavtiki.
Klasifikacija: 1 270 MPa 1) / 600 °C 2)
General Information
- Status
- Published
- Publication Date
- 17-Aug-2010
- Withdrawal Date
- 27-Feb-2011
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 18-Aug-2010
- Completion Date
- 18-Aug-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
EN 4673-004:2010 defines the characteristics of self-locking, UNJ-threaded inserts with self-broaching keys manufactured in the heat-resisting nickel base alloy NI‑P100HT (Inconel 718) and finished by silver plating for aerospace applications. The standard is part of the Aerospace series published by CEN and complements the design and installation documents in the EN 4673 family.
Key material and performance notes from the standard:
- Material: Inserts are specified as EN 2952 treated (Inconel NI‑P100HT). Insert hardness is specified at 370–480 HV. Keys are stainless steel or nickel alloy treated for >600 HV.
- Classification: Minimum tensile capability and thermal endurance are identified as 1 270 MPa / 600 °C.
- Surface treatment: Electrolytic silver plating is applied in accordance with EN 2786; dimensions and tolerances are stated after plating.
Key Topics
- Configuration and dimensions: The standard provides detailed configuration, dimensional tolerances and masses for normal and repair sizes (Normal, First repair, Second repair). External thread limits for common UNS sizes are listed in tabular form.
- Insert definition and features: Includes requirements for key geometry, pitch diameters, out-of-round form for self-locking action, and marking areas. Sharp edges must be removed to specified radii.
- Designation and marking: Prescribes a uniform designation format (example: EN4673-004-5-0) and marking style per EN 2424 (style F). Manufacturer identification follows TR 3198.
- Normative references: Related standards required for application include EN 2952 (material), EN 2786 (silver plating), EN 4673-001/002/003 (installation, design, technical specification), ISO 3161 and others.
Applications
EN 4673-004:2010 is intended for aerospace assemblies requiring robust, high-temperature threaded inserts where UNJ threads and self-broaching keys provide secure, self-locking attachment. Typical practical benefits include:
- High-temperature resistance and retention of mechanical properties up to 600 °C
- Corrosion protection and improved contact conductivity from silver plating
- Availability of normal and repair-size inserts to facilitate maintenance and overhaul
- Compatibility with established UNJ thread geometry (ISO 3161)
Use cases include repair and new-build fastening of engine components, airframe attachments and other critical joints where Inconel‑based inserts are required.
Related Standards
- EN 4673-001: Installation and removal procedure
- EN 4673-002: Design standard
- EN 4673-003: Technical specification
- EN 2786: Electrolytic silver plating of fasteners
- EN 2952: NI-PH2601 / heat-resisting alloy treatment
- EN 2424: Marking of aerospace products
- ISO 3161: UNJ thread general requirements
For detailed dimensional tables, repair codes and marking examples refer to the full EN 4673-004:2010 document and the companion EN 4673 parts.
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Frequently Asked Questions
EN 4673-004:2010 is a standard published by the European Committee for Standardization (CEN). Its full title is "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". This standard covers: This European Standard specifies the characteristics of self-locking, inserts for Inch series, self-broaching keys, in NI P100HT, silver plated, for aerospace applications. Classification: 1 270 MPa ) / 600 °C )
This European Standard specifies the characteristics of self-locking, inserts for Inch series, self-broaching keys, in NI P100HT, silver plated, for aerospace applications. Classification: 1 270 MPa ) / 600 °C )
EN 4673-004:2010 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 4673-004:2010 has the following relationships with other standards: It is inter standard links to EN 2424:2008, EN 10244-1:2009, EN 4673-002:2010, EN 4673-003:2010, EN 2786:2008, EN 4673-001:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 4673-004:2010 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.SRVUHEUHQLLuft- und Raumfahrt - Gewindeeinsätze, UNJ-Gewinden, selbstsichernd, mit selbsträumenden Stiften - Teil 004: Aus Hochwarmfeste Nickellegierung NI-P100HT (Inconel 718), VersilbernSérie aérospatiale - Douilles filetées, à filetage UNJ, à freinage interne, à clavettes auto-brochantes - Partie 004 : En alliage résistant à chaud base nickel NI-P100HT (Inconel 718), argentageAerospace series - Inserts, UNJ threads, self-locking, with self-broaching keys - Part 004: In heat resisting nickel base alloy NI-P100HT (Inconel 718), silver plating49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 4673-004:2010SIST EN 4673-004:2010en01-oktober-2010SIST EN 4673-004:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4673-004
August 2010 ICS 49.030.30 English Version
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
Série aérospatiale - Douilles filetées, à filetage UNJ, à freinage interne, à clavettes auto-brochantes - Partie 004: En alliage résistant à chaud base nickel NI-P100HT (Inconel 718), argentage
Luft- und Raumfahrt - Gewindeeinsätze, UNJ-Gewinden, selbstsichernd, mit selbsträumenden Stiften -Teil 004: Aus Hochwarmfeste Nickellegierung NI-P100HT (Inconel 718), Versilbern 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
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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 4673-004:2010: ESIST EN 4673-004:2010
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