SIST EN 4173:2008
(Main)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
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
- 08-Apr-2008
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Apr-2008
- Due Date
- 06-Jun-2008
- Completion Date
- 09-Apr-2008
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
Overview
SIST EN 4173:2008 is a European standard developed by CEN for the aerospace sector, specifying the requirements for lockbolts with a 100° countersunk normal head, sheartype, close tolerance, made in titanium alloy TI-P64001, and anodized, in a metric series. These aerospace lockbolts are classified for applications requiring a minimum tensile strength of 1,100 MPa at ambient temperature and usage up to 315°C. The standard covers both versions with and without pintail, which are statically and dynamically equivalent after installation. SIST EN 4173:2008 is intended for use with collars defined in EN 4174 or EN 4175.
Key Topics
- Lockbolts Characteristics: EN 4173 defines dimensions, tolerances, configurations, and mass properties for countersunk head lockbolts designed for shear applications within aerospace assemblies.
- Material Specifications: The lockbolts are manufactured from titanium alloy TI-P64001, offering high strength-to-weight ratio and corrosion resistance. The final product is anodized according to EN 2808 for enhanced durability.
- Performance Classification: These bolts are rated for 1,100 MPa minimum tensile strength at room temperature and maintain structural integrity up to 315°C, making them suitable for demanding environments.
- Versions: Both "pulltype" (with pintail) and "stumptype" (without pintail) lockbolts are covered; both support manual or automated installation while providing the same mechanical performance.
- Collar Compatibility: EN 4173 lockbolts are designed to be used with compatible collars in accordance with EN 4174 (aluminium alloy) or EN 4175 (titanium series).
- Surface Treatments and Marking: Anodizing and chlorine-free cetyl alcohol lubrication are required, ensuring long-term operation in harsh aerospace conditions and compliance with marking requirements per EN 2424.
Applications
The EN 4173 lockbolts see widespread use in the aerospace industry, particularly in the assembly of airframes and other structural components where precision, strength, and resistance to mechanical and environmental stresses are critical. Key applications include:
- Aircraft Fuselage and Wing Structures: For joining panels and frames where flush, tight-tolerance, high-strength fasteners are required.
- Engine Attachments and Fixed Equipment: Where components are subject to extreme temperatures and need reliable, vibration-resistant fastenings.
- Spacecraft and High-Performance Aerospace Vehicles: Thanks to the titanium alloy’s low weight and high temperature tolerance, these lockbolts are ideal for critical load paths in advanced aerospace vehicles.
The combination of metric sizing, high mechanical performance, and compatibility with automated installation processes makes these lockbolts a preferred choice for certified aerospace manufacturers and their supply chains.
Related Standards
Understanding SIST EN 4173:2008 is facilitated by familiarity with related European aerospace standards, including:
- EN 2424: Specifies marking requirements for aerospace products.
- EN 2808: Details anodizing procedures for titanium and its alloys.
- EN 4174: Covers collars, swage locking, sheartype, in aluminium alloy, for use with EN 4173 lockbolts.
- EN 4175: Pertains to collars, flanged swage locking, sheartype, in titanium, compatible with this lockbolt series.
- EN 4176: Provides broader technical specifications for titanium lockbolts.
- MIL-L-87132B: U.S. Department of Defense specification for lubricant use on fasteners.
By adhering to SIST EN 4173:2008, aerospace manufacturers and suppliers ensure optimal performance, traceability, and compatibility across a range of high-integrity aerostructural applications. This standard is vital for quality assurance and conformity in the European and global aerospace supply chain.
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Frequently Asked Questions
SIST EN 4173:2008 is a standard published by the Slovenian Institute for Standardization (SIST). 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.
SIST EN 4173:2008 is classified under the following ICS (International Classification for Standards) categories: 49.030.20 - Bolts, screws, studs. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 4173:2008 has the following relationships with other standards: It is inter standard links to SIST EN 2808:2001, SIST EN 4175:2006, SIST EN 4174:2008, SIST EN 4176:2006, SIST EN 2424:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 4173:2008 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)
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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