Aerospace series - Lockbolts, protruding head, sheartype, close tolerance, in titanium alloy TI-P64001, with aluminium pigmented coating, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C

This standard specifies the characteristics of lockbolts with protruding head, sheartype, close tolerance, in titanium alloy TI-P64001, with aluminium pigmented coating, metric series, for use in aerospace applications.
Classification: 1 100 MPa / 315 °C
In both versions, i.e. with and without pintail these lockbolts fulfill the same function when installed and are statically / dynamically equivalent.
They are intended to be used with collars to EN 4174 or EN 4175.

Luft- und Raumfahrt - Passniete, mit Universalkopf, Schertyp, aus Titanlegierung TI-P64001, mit Aluminium pigmentierter Beschichtung, metrische Reihe - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °C

Diese Norm legt die Merkmale von Passnieten mit Universalkopf für Scherbeanspruchung, aus Titanlegierung TI-P64001, mit aluminiumpigmentierter Beschichtung, metrische Reihe, für Anwendungen in der Luft- und Raumfahrt fest.
Klasse: 1 100 MPa ) /315 °C )
In beiden Ausführungen, d. h. mit und ohne Abrissteil, erfüllen diese Passnieten nach dem Einbau die gleiche Funktion und sind statisch und dynamisch gleichwertig.
Sie sind für die Verwendung mit Schließringen nach EN 4174 oder EN 4175 bestimmt.

Série aérospatiale - Rivets à bague sertie, à tête cylindrique, à cisaillement, à tolérance serrée, en alliage de titane TI-P64001, avec revêtement alumino-organique, série métrique - Classification : 1 100 MPa (à température ambiante) / 315 °C

Aeronavtika - Zapirni vijaki, dvignjena glava, strižni tip, ozka toleranca, iz titanove zlitine TI-P64001, z aluminijem pigmentiranim premazom, metrska serija - Klasifikacija: 1100 MPa (pri temperaturi okolice)/315 °C

General Information

Status
Published
Publication Date
02-May-2006
Withdrawal Date
29-Nov-2006
ICS
49.030.50 - Washers and other locking elements
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 3 - Mechanical
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
31-May-2017
Completion Date
14-Apr-2025
Ref Project
SIST EN 4401:2009 - Aerospace series - Lockbolts, protruding head, sheartype, close tolerance, in titanium alloy TI-P64001, with aluminium pigmented coating, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C

Overview

EN 4401:2006 is a European standard developed by CEN that specifies the characteristics and technical requirements for aerospace-grade lockbolts. These lockbolts feature a protruding head, sheartype design with close tolerances, manufactured from titanium alloy TI-P64001. They come with an aluminium pigmented coating and are designed in a metric series for high performance in aerospace applications.

The standard classifies these lockbolts with a tensile strength of 1100 MPa at ambient temperature and a maximum use temperature of 315 °C. EN 4401 lockbolts are supplied in two functional versions: with a pintail (pulltype) and without (stumptype). Both versions provide equivalent static and dynamic performance once installed and are intended to be used with collars conforming to EN 4174 or EN 4175.

Key Topics

  • Material Specifications
    Lockbolts are made from titanium alloy TI-P64001, meeting a minimum tensile strength of 1100 MPa at ambient temperature. This material ensures lightweight, high-strength fastening suitable for demanding aerospace environments.

  • Surface Treatment
    The lockbolts include an aluminium pigmented coating, enhancing corrosion resistance and surface durability. The coating process follows the procedures described in EN 4474, ensuring consistent performance within specifications.

  • Design and Tolerances
    EN 4401 details precise dimensional requirements, including shank diameter tolerances before and after coating, grip lengths, and overall lengths. Close tolerances are maintained to guarantee reliability and compatibility with mating collars.

  • Versions and Functionality
    Two main lockbolt versions exist:

    • Pulltype (Pintail version): Features a pintail for installation using automatic riveting tools.
    • Stumptype (No pintail): Designed for manual installation.
      Both versions are dynamically and statically equivalent after installation with collars.

  • Marking and Identification
    Lockbolts are marked according to EN 2424 Style C to provide traceability, including manufacturer symbols and product codes, ensuring compliance and quality assurance throughout their lifecycle.

Applications

EN 4401 lockbolts are specifically designed for aerospace assemblies where strength, weight, and temperature resistance are critical. Practical applications include:

  • Aircraft structural assemblies requiring secure shear-type fastening
  • High-temperature sections of aircraft where components must endure up to 315 °C without degradation
  • Fastening in aerospace components where precision and close tolerance fit are essential for performance and safety
  • Situations requiring metal fasteners with excellent corrosion resistance due to aluminium pigmented coatings

These lockbolts are utilized alongside collars (EN 4174 or EN 4175), which provide the swaged locking mechanism to maintain joint integrity under static and dynamic load conditions typically found in aerospace environments.

Related Standards

For comprehensive aerospace fastening solutions, EN 4401 works in conjunction with several related standards, including:

  • EN 4174: Collars for swage locking sheartype lockbolts in aluminium alloy, anodized or chromated, metric series.
  • EN 4175: Flanged swage locking collars made of titanium alloy TI-P99002 for metric lockbolt series.
  • EN 4176: Technical specification for lockbolts in titanium alloy TI-P64001, including surface treatment options like anodizing or aluminium pigmented coating.
  • EN 2424: Marking of aerospace products, ensuring lockbolts are traceable and identifiable.
  • EN 4474: Defines aluminium pigmented coating methods for aerospace fasteners for improved durability and corrosion resistance.
  • MIL-L-87132B: Lubrication specifications applicable to aerospace fasteners, particularly concerning coating and surface protection.
  • TR 3775: Materials designation for bolts and pins applied in aerospace contexts, detailing titanium alloys' classifications.

Keywords: EN 4401, aerospace lockbolts, titanium alloy TI-P64001, aluminium pigmented coating, sheartype lockbolts, metric lockbolts, aerospace fastening standards, close tolerance lockbolts, aerospace collars, tensile strength lockbolts, high-temperature lockbolts

Frequently Asked Questions

EN 4401:2006 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Lockbolts, protruding head, sheartype, close tolerance, in titanium alloy TI-P64001, with aluminium pigmented coating, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C". This standard covers: This standard specifies the characteristics of lockbolts with protruding head, sheartype, close tolerance, in titanium alloy TI-P64001, with aluminium pigmented coating, metric series, for use in aerospace applications. Classification: 1 100 MPa / 315 °C In both versions, i.e. with and without pintail these lockbolts fulfill the same function when installed and are statically / dynamically equivalent. They are intended to be used with collars to EN 4174 or EN 4175.

This standard specifies the characteristics of lockbolts with protruding head, sheartype, close tolerance, in titanium alloy TI-P64001, with aluminium pigmented coating, metric series, for use in aerospace applications. Classification: 1 100 MPa / 315 °C In both versions, i.e. with and without pintail these lockbolts fulfill the same function when installed and are statically / dynamically equivalent. They are intended to be used with collars to EN 4174 or EN 4175.

EN 4401:2006 is classified under the following ICS (International Classification for Standards) categories: 49.030.50 - Washers and other locking elements. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 4401:2006 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.Aeronavtika - Zapirni vijaki, dvignjena glava, strižni tip, ozka toleranca, iz titanove zlitine TI-P64001, z aluminijem pigmentiranim premazom, metrska serija - Klasifikacija: 1100 MPa (pri temperaturi okolice)/315 °CLuft- und Raumfahrt - Passniete, mit Universalkopf, Schertyp, aus Titanlegierung TI-P64001, mit Aluminium pigmentierter Beschichtung, metrische Reihe - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °CSérie aérospatiale - Rivets à bague sertie, à tête cylindrique, à cisaillement, à tolérance serrée, en alliage de titane TI-P64001, avec revêtement alumino-organique, série métrique - Classification : 1 100 MPa (à température ambiante) / 315 °CAerospace series - Lockbolts, protruding head, sheartype, close tolerance, in titanium alloy TI-P64001, with aluminium pigmented coating, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C49.030.50Podložke in drugi blokirni elementiWashers and other locking elements49.025.30TitanTitanium49.025.20AluminijAluminiumICS:Ta slovenski standard je istoveten z:EN 4401:2006SIST EN 4401:2009en,de01-junij-2009SIST EN 4401:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4401
May 2006 ICS 49.030.50 English Version
Aerospace series -Lockbolts, protruding head, sheartype, close tolerance, in titanium alloy TI-P64001, with aluminium pigmented coating, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C
Série aérospatiale - Rivets à bague sertie, à tête cylindrique, à cisaillement, à tolérance serrée, en alliage de titane TI-P64001, avec revêtement alumino-organique, série métrique - Classification : 1 100 MPa (à température ambiante) / 315 °C
Luft- und Raumfahrt - Paßniete, mit Universalkopf, Schertyp, aus Titanlegierung TI-P64001, mit Aluminium pigmentierter Beschichtung, metrische Reihe - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °C This European Standard was approved by CEN on 13 January 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, 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
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B-1050 Brussels © 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4401:2006: ESIST EN 4401:2009
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