EN 3914:2008
(Main)Aerospace series - Insert, thin wall, self-locking, long, in heat resisting nickel base alloy NI-PH2601 (NI-P100HT, Inconel 718), silver plated on internal thread, for salvage of components
Aerospace series - Insert, thin wall, self-locking, long, in heat resisting nickel base alloy NI-PH2601 (NI-P100HT, Inconel 718), silver plated on internal thread, for salvage of components
This standard specifies the characteristics of long self locking, thin wall salvage inserts, in NI-PH2601 (NI P100HT), with silver plated internal thread, for aerospace applications.
Maximum test temperature 550 °C.
Luft- und Raumfahrt - Gewindeeinsätze, dünnwandig, selbstsichernd, lang, aus hochwarmfester Nickelbasislegierung NI-PH2601 (NI-P100HT, Inconel 718), Innengewinde versilbert, zur Nacharbeit von Bauteilen
Diese Norm legt die Eigenschaften von selbstsichernden, langen, dünnwandigen Gewindeeinsätzen zur Nacharbeit von Bauteilen, aus NI PH2601 (NI P100HT), mit versilbertem Innengewinde, für die Anwendung in der Luft- und Raumfahrt fest.
Maximale Prüftemperatur 550 °C.
Série aérospatiale - Douilles filetées, à paroi mince, à freinage interne, longues, en alliage résistant à chaud à base de nickel NI-PH2601(NI-P100HT, Inconel 718), argentées sur filetage intérieur, pour récupération
Aeronavtika - Vložki, tanka stena, samozapiralni, dolgi, iz toplotnoodporne zlitine na nikljevi osnovi NI-PH2601 (NI-P100HT, Inconel 718), posrebren notranji navoj, za popravljanje sestavnih delov
General Information
- Status
- Published
- Publication Date
- 27-May-2008
- Withdrawal Date
- 29-Nov-2008
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 21-Jan-2024
- Completion Date
- 28-Jan-2026
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 3914:2008 is a European standard developed by CEN that defines the specifications for aerospace-grade long, thin wall, self-locking inserts made from heat-resisting nickel base alloy NI-PH2601 (also known as NI-P100HT or Inconel 718). These inserts feature silver-plated internal threads and are designed specifically for salvaging aerospace components. The standard ensures high performance under demanding conditions, with a maximum test temperature of 550 °C, making it ideal for high-temperature aerospace applications.
Key Topics
- Material Composition: Inserts are made from NI-PH2601, a heat-resistant nickel base alloy known for exceptional mechanical strength and corrosion resistance at elevated temperatures.
- Design and Dimensions: The standard specifies insert configurations, dimensions, tolerances, and mass for various thread sizes. The inserts feature thin walls, self-locking mechanisms, and specially designed grooves and serrations to ensure secure fastening and ease of installation.
- Surface Treatment: The internal threads are silver plated in accordance with EN 2786, with minimum plating thickness requirements to enhance thread durability and resistance to wear and corrosion. The counterbore diameter is also silver plated for full coverage.
- Self-Locking Feature: The inserts utilize out-of-round thread forms and knurling to provide a reliable self-locking effect, critical for maintaining joint integrity in vibration-heavy aerospace environments.
- Marking and Identification: Manufacturer's identification is marked using V-section grooves as per EN 2424 and TR 3198, ensuring traceability and compliance.
- Testing and Performance: Inserts meet stringent aerospace performance requirements, including mechanical strength and thermal stability, verified through standardized test methods.
Applications
EN 3914:2008 inserts are primarily employed in aerospace component salvage operations where damaged or worn threads need to be repaired without replacing entire components. Their high-temperature resistance and self-locking design make them especially suited for:
- Aircraft engine components
- High-performance airframe assemblies
- Turbine and exhaust system repairs
- Applications requiring reliable thread reinforcement that withstand thermal cycling and mechanical stress
These inserts help extend the life of valuable aerospace parts, reduce maintenance costs, and improve safety by restoring the structural integrity of threaded fastenings.
Related Standards
Understanding and applying EN 3914:2008 is enhanced by referencing complementary aerospace standards:
- EN 3298: Procedures for installation and removal of thin wall, self-locking inserts.
- EN 3916: Salvage procedures specifically adapted for thin wall inserts in aerospace components.
- EN 2786: Details requirements for electrolytic silver plating on fasteners.
- EN 3915: Specifications for inserts similar to EN 3914 but for different strength classifications.
- EN 2404 and EN 4376/4377: Standards related to the heat-resistant nickel alloy NI-PH2601 material properties.
- ISO 965-1 and ISO 5855-2: Thread tolerance and dimension standards ensuring international metric compatibility.
These standards work together to provide a comprehensive framework for manufacturing, testing, and applying self-locking inserts in aerospace settings, ensuring compliance, traceability, and high reliability.
Keywords: EN 3914:2008, aerospace inserts, self-locking inserts, nickel base alloy NI-PH2601, Inconel 718, silver plated threads, salvage inserts, heat resistant inserts, aerospace fasteners, aerospace repair standard, screw thread inserts, aerospace component salvage.
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Frequently Asked Questions
EN 3914:2008 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Insert, thin wall, self-locking, long, in heat resisting nickel base alloy NI-PH2601 (NI-P100HT, Inconel 718), silver plated on internal thread, for salvage of components". This standard covers: This standard specifies the characteristics of long self locking, thin wall salvage inserts, in NI-PH2601 (NI P100HT), with silver plated internal thread, for aerospace applications. Maximum test temperature 550 °C.
This standard specifies the characteristics of long self locking, thin wall salvage inserts, in NI-PH2601 (NI P100HT), with silver plated internal thread, for aerospace applications. Maximum test temperature 550 °C.
EN 3914:2008 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 3914:2008 has the following relationships with other standards: It is inter standard links to EN 2424:2008, EN 3298:2008, EN 3916:2008, EN 840-6:2004+A1:2008, EN 3915:2008, EN 2786:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3914:2008 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-september-2008
Aeronavtika - Vložki, tanka stena, samozapiralni, dolgi, iz toplotnoodporne zlitine
na nikljevi osnovi NI-PH2601 (NI-P100HT, Inconel 718), posrebren notranji navoj, za
popravljanje sestavnih delov
Aerospace series - Insert, thin wall, self-locking, long, in heat resisting nickel base alloy
NI-PH2601 (NI-P100HT, Inconel 718), silver plated on internal thread, for salvage of
components
Luft- und Raumfahrt - Gewindeeinsätze, dünnwandig, selbstsichernd, lang, aus
hochwarmfester Nickelbasislegierung NI-PH2601 (NI-P100HT, Inconel 718),
Innengewinde versilbert, zur Nacharbeit von Bauteilen
Série aérospatiale - Douilles filetées, à paroi mince, à freinage interne, longues, en
alliage résistant à chaud à base de nickel NI-PH2601(NI-P100HT, Inconel 718),
argentées sur filetage intérieur, pour récupération
Ta slovenski standard je istoveten z: EN 3914:2008
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 3914
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2008
ICS 49.030.30
English Version
Aerospace series - Insert, thin wall, self-locking, long, in heat
resisting nickel base alloy NI-PH2601 (NI-P100HT, Inconel 718),
silver plated on internal thread, for salvage of components
Série aérospatiale - Douilles filetées, à paroi mince, à Luft- und Raumfahrt - Gewindeeinsätze, dünnwandig,
freinage interne, longues, en alliage résistant à chaud à selbstsichernd, lang, aus hochwarmfester
base de nickel NI-PH2601(NI-P100HT, Inconel 718), Nickelbasislegierung NI-PH2601 (NI-P100HT, Inconel 718),
argentées sur filetage intérieur, pour récupération Innengewinde versilbert, zur Nacharbeit von Bauteilen
This European Standard was approved by CEN on 29 February 2008.
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, 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: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3914:2008: E
worldwide for CEN national Members.
Contents Page
Foreword.3
Introduction .4
1 Scope.4
2 Normative references.4
3 Required characteristics.5
3.1 Configuration - Dimensions - Tolerances - Masses.5
3.2 Material.5
3.3 Surface treatment.5
4 Designation.6
5 Marking and identification .6
6 Technical specification.6
Foreword
This document (EN 3914:2008) 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 November 2008, and conflicting national standards shall be withdrawn
at the latest by November 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/
...
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