Aerospace series - Lockbolts, 100° countersunk normal head, sheartype, close tolerance, in titanium alloy TI-P64001, anodized, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C

This standard specifies the characteristics of lockbolts with 100° countersunk normal head, sheartype, close tolerance, in titanium alloy TI-P64001, anodized, 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 100° normalem Senkkopf, Schertyp, aus Titanlegierung TI-P64001, anodisiert, metrische Reihe - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °C

Diese Norm legt die Merkmale von Passnieten mit 100° normalen Senkkopf, für Scherbeanspruchung, aus Titanlegierung TI P64001, anodisiert, 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 Passniete 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 fraisée 100° normale, à cisaillement, à tolérance serrée, en alliage de titane TI-P64001, anodisés, série métrique - Classification : 1 100 MPa (à température ambiante) / 315 °C

Aeronavtika - Zapirni vijaki, 100° ugreznjena glava, strižni tip, ozka toleranca, iz titanove zlitine TI-P64001, anodizirani, metrska serija - Klasifikacija: 1 100 MPa (pri temperaturi okolice) / 315 °C

General Information

Status
Published
Publication Date
11-Apr-2006
Withdrawal Date
30-Oct-2006
ICS
49.030.60 - Rivets
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 4173:2008 - Aerospace series - Lockbolts, 100° countersunk normal head, sheartype, close tolerance, in titanium alloy TI-P64001, anodized, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C

Overview

EN 4173:2006 is a European aerospace standard that specifies the requirements for lockbolts featuring a 100° countersunk normal head, sheartype, and close tolerance. These lockbolts are made from the titanium alloy TI-P64001 and are anodized for enhanced surface protection. Designed as part of a metric series, they are classified to withstand a minimum tensile strength of 1,100 MPa at ambient temperature and a maximum operating temperature of 315 °C without degradation. This standard applies specifically to aerospace applications, ensuring safety, reliability, and performance in critical aircraft assembly processes. Both pintail (pull-type) and stumptype (without pintail) versions are covered, and they maintain static and dynamic equivalence when properly installed.

Key Topics

  • Material and Strength

    • Titanium alloy TI-P64001 with anodized surface treatment for corrosion resistance according to EN 2808.
    • Classified to meet a tensile strength of 1,100 MPa at room temperature.
    • Maximum service temperature of 315 °C ensuring stable performance under thermal stress.

  • Design and Dimensions

    • Lockbolts feature a 100° countersunk normal head with close tolerance fit for precision assembly.
    • Available in metric sizes with detailed dimensions and mass specified for each diameter and length code.
    • Versions include 'P' (with pintail) and 'S' (without pintail) that perform equivalently after installation.

  • Compatibility

    • Intended to be used with collars conforming to EN 4174 or EN 4175 standards, which cover swage locking collars in aluminum or titanium alloys.
    • Lubrication and surface finishing follow MIL-L-87132B (cetyl alcohol application) to ensure proper installation and longevity.

  • Marking and Identification

    • Lockbolts are marked according to EN 2424, style C, enabling traceability and quality assurance throughout aerospace manufacturing and maintenance.
    • Detailed coding system includes diameter, length, version, and optional sealant escape groove features.

Applications

EN 4173 lockbolts are engineered for aerospace structural fastening where high strength, lightweight, and corrosion resistance are critical. Typical applications include:

  • Aircraft airframe assembly requiring precise, durable fasteners with high fatigue resistance.
  • Components exposed to elevated temperatures up to 315 °C, such as engine mounts or specific heat zones.
  • Repair and maintenance operations where interchangeability with pintail or stumptype lockbolts is essential.
  • Use in conjunction with aluminum or titanium alloy collars to maintain joint integrity and secure shearing resistance.

By adhering to EN 4173:2006, manufacturers and maintenance personnel ensure compliance with stringent aerospace regulations and enhance the safety and reliability of critical aircraft structures.

Related Standards

EN 4173 is part of a wider aerospace fastening series, with important cross-references including:

  • EN 4174: Aerospace collars, swage locking, sheartype in anodized or chromated aluminum alloy 2024.
  • EN 4175: Aerospace collars, flanged swage locking, sheartype, made in titanium TI-P99002.
  • EN 4176: Technical specifications for lockbolts with normal or protruding heads, tension/shear-type, in titanium alloy TI-P64001.
  • EN 2808: Standard for anodizing titanium and titanium alloys, ensuring protective surface coatings for aerospace components.
  • EN 2424: Requirements and methods for marking aerospace products for traceability and identification.

Compliance with these interconnected standards ensures a cohesive approach to aerospace fasteners’ design, manufacture, and quality assurance, supporting industry best practices and regulatory demands.

Keywords: EN 4173, aerospace lockbolts, titanium lockbolts, 100° countersunk head, sheartype lockbolts, metric lockbolts, titanium alloy TI-P64001, anodized lockbolts, aerospace fasteners, swage locking collars, high strength aerospace fasteners, aerospace standard CEN, lockbolt classification 1100 MPa, high temperature aerospace fasteners.

Frequently Asked Questions

EN 4173:2006 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Lockbolts, 100° countersunk normal head, sheartype, close tolerance, in titanium alloy TI-P64001, anodized, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C". This standard covers: This standard specifies the characteristics of lockbolts with 100° countersunk normal head, sheartype, close tolerance, in titanium alloy TI-P64001, anodized, 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 100° countersunk normal head, sheartype, close tolerance, in titanium alloy TI-P64001, anodized, 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 4173:2006 is classified under the following ICS (International Classification for Standards) categories: 49.030.60 - Rivets. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 4173:2006 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, 100° ugreznjena glava, strižni tip, ozka toleranca, iz titanove zlitine TI-P64001, anodizirani, metrska serija - Klasifikacija: 1 100 MPa (pri temperaturi okolice) / 315 °CLuft- und Raumfahrt - Passniete, mit 100°
normalem Senkkopf, Schertyp, aus Titanlegierung TI-P64001, anodisiert, metrische Reihe - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °CSérie aérospatiale - Rivets à bague sertie, à tête fraisée 100°
normale, à cisaillement, à tolérance serrée, en alliage de titane TI-P64001, anodisés, série métrique - Classification : 1 100 MPa (à température ambiante) / 315 °CAerospace series - Lockbolts, 100° countersunk normal head, sheartype, close tolerance, in titanium alloy TI-P64001, anodized, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C49.030.20Sorniki, vijaki, stebelni vijakiBolts, screws, studsICS:Ta slovenski standard je istoveten z:EN 4173:2006SIST EN 4173:2008en,de01-junij-2008SIST EN 4173:2008SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4173
April 2006 ICS 49.030.60 English Version
Aerospace series - Lockbolts, 100
countersunk normal head, sheartype, close tolerance, in titanium alloy TI-P64001, anodized, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C
Série aérospatiale - Rivets à bague sertie, à tête fraisée 100
normale, à cisaillement, à tolérance serrée, en alliage de titane TI-P64001, anodisés, série métrique - Classification : 1 100 MPa (à température ambiante) / 315 °C
Luft- und Raumfahrt - Paßniete, mit 100
normalem Senkkopf, Schertyp, aus Titanlegierung TI-P64001, anodisiert, 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
Management Centre: rue de Stassart, 36
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 4173:2006: ESIST EN 4173:2008
...

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