SIST EN 4402:2009

Aerospace series - Lockbolts, 100° countersunk normal 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 100° countersunk normal 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 100° normalem Senkkopf, Schertyp, aus Titanlegierung TI-P64001, mit Aluminium pigmentierter Beschichtung, metrische Reihe - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °C

Diese Norm legt die Eigenschaften von Passnieten mit 100° normalem Senkkopf, für Scherbeanspruchung, aus Titanlegierung TI P64001, mit Aluminium pigmentierter Beschichtung, metrische Reihe, für die Anwen¬dung in der Luft- und Raumfahrt fest.
Klasse: 1 100 MPa ) /315 °C )
Bei 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 eine gemeinsame Anwendung 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, avec revêtement alumino-organique, 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, z aluminijem pigmentiranim premazom, metrska serija - Klasifikacija: 1100 MPa (pri temperaturi okolice)/315 °C

General Information

• Status: Published
• Publication Date: 03-May-2009
• ICS: 49.025.20 - Aluminium
• ICS: 49.025.30 - Titanium
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 21-Apr-2009
• Due Date: 26-Jun-2009
• Completion Date: 04-May-2009
• Ref Project: EN 4402:2006 - Aerospace series - Lockbolts, 100° countersunk normal 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

SIST EN 4402:2009 is a European standard developed by CEN, specifying aerospace-grade lockbolts designed for critical applications in the aviation and aerospace industries. These lockbolts feature a 100° countersunk normal head, are of shear type, and conform to close tolerance dimensions. Manufactured from the titanium alloy TI-P64001 with an aluminium pigmented coating, they belong to the metric series and are classified for use at a minimum tensile strength of 1100 MPa at ambient temperature and capable of withstanding temperatures up to 315 °C.

This standard ensures that lockbolts, with or without a pintail, provide equivalent static and dynamic performance when installed. The lockbolts are designed for use in combination with collars conforming to related standards EN 4174 and EN 4175.

Key Topics

• Material Composition: Titanium alloy TI-P64001 offers an optimal balance of strength, corrosion resistance, and lightweight properties essential for aerospace fasteners.
• Mechanical Performance: Rated for a tensile strength of 1100 MPa at ambient temperature and stable performance up to 315 °C, suitable for high-stress aerospace environments.
• Design Features:
  • 100° countersunk normal head aiding flush installation.
  • Shear-type mechanism for reliable load transfer.
  • Close tolerance manufacturing minimizes variability, ensuring consistency in critical assemblies.
• Surface Treatment: Aluminium pigmented coating enhances corrosion resistance and durability, complying with EN 4474 coating guidelines.
• Versions: Available with pintail ('P' for pulltype) or without pintail ('S' for stumptype), maintaining performance equivalence.
• Compatibility: Intended for use with aerospace collars per EN 4174 (aluminium alloy collars) or EN 4175 (titanium collars).

Applications

SIST EN 4402:2009 lockbolts are widely adopted in aerospace structural assemblies where secure, durable fastening is critical to safety and performance. Typical applications include:

• Aircraft Structural Assemblies: Wing panels, fuselage skins, and internal framework requiring flush, weight-optimized fastening.
• Engine and Powerplant Components: Areas exposed to high temperatures where material and mechanical capabilities must meet stringent criteria.
• Spacecraft Structures: Lightweight, high-strength fasteners essential for aerospace vehicles tasked with demanding environmental conditions.
• Repair and Maintenance: Standardized lockbolts simplify replacement and ensure consistent mechanical behavior during aircraft servicing.
• Advanced Manufacturing: Facilitates automated riveting processes using versions with pintail when applicable.

Utilizing these lockbolts contributes to enhanced reliability, extended service life, and safety in aerospace engineering.

Related Standards

• EN 4174 – Aerospace series collars, swage locking, sheartype, aluminium alloy 2024 anodized/chromated, metric series.
• EN 4175 – Aerospace collars, flanged swage locking, sheartype, titanium TI-P99002, metric series.
• EN 4176 – Technical specifications for lockbolts with 100° countersunk normal or protruding heads in titanium alloy TI-P64001.
• EN 4474 – Specifications for aluminium pigmented coatings and coating methods.
• EN 2424 – Aerospace product marking standards, including style C marking relevant to EN 4402 lockbolts.
• TR 3775 – Aerospace bolts and pins material specifications.
• MIL-L-87132B – Chlorine-free lubricant application to fasteners, referenced for lubrication guidelines.

Compliance Advice

Organizations using EN 4402 lockbolts should ensure procurement documentation clearly specifies version type (‘P’ with pintail or ‘S’ without) and confirm collar compatibility for optimal installation. Proper marking and traceability per EN 2424 are mandated to maintain aerospace quality assurance protocols.

---

Keywords: EN 4402 lockbolts, aerospace fasteners, titanium alloy TI-P64001, 100° countersunk head, shear type lockbolts, aluminium pigmented coating, metric series lockbolts, close tolerance lockbolts, aerospace standard lockbolts, high-strength titanium fasteners, aerospace assembly hardware.

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, z aluminijem pigmentiranim premazom, metrska serija - Klasifikacija: 1100 MPa (pri temperaturi okolice)/315 °CLuft- und Raumfahrt - Passniete, mit 100° normalem Senkkopf, 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 fraisée 100° normale, 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, 100° countersunk normal head, sheartype, close tolerance, in titanium alloy TI-P64001, with aluminium pigmented coating, metric series - Classification: 1 100 MPa (at ambient temperature) / 315 °C49.030.20Sorniki, vijaki, stebelni vijakiBolts, screws, studs49.025.30TitanTitanium49.025.20AluminijAluminiumICS:Ta slovenski standard je istoveten z:EN 4402:2006SIST EN 4402:2009en,de01-junij-2009SIST EN 4402:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4402
May 2006 ICS 49.030.20 English Version
Aerospace series - Lockbolts, 100° countersunk normal 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 fraisée 100° normale, 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 100° normalem Senkkopf, 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
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 4402:2006: ESIST EN 4402:2009
...