Aerospace series - Screws, 100° countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating - Classification: 1 100 MPa (at ambient temperature) / 315 °C

This standard specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating.
Classification: 1 100 MPa  / 315 °C

Luft- und Raumfahrt - 100° -Senk-Passschrauben mit Flügelkreuzschlitz, kurzes Gewinde aus Titanlegierung, anodisiert, mit aluminiumpigmentierter Beschichtung - Klasse: 1 100 MPa (bei Raumtemperatur)/315 °C

Diese Norm legt die Eigenschaften von 100°-Senk-Passschrauben mit Flügelkreuzschlitz und kurzem Gewinde, aus Titanlegierung, anodisiert, mit aluminiumpigmentierter Beschichtung fest.
Klasse: 1 100 MPa )/315 °C )

Série aérospatiale - Vis à tête fraisée 100° normale, à empreinte cruciforme déportée, fût normal à tolérance serrée, filetage court, en alliage de titane, anodisées, avec revêtement alumino-organique - Classification : 1 100 MPa (à température ambiante) / 315 °C

Aeronavtika – Vijaki, 100° ugrezna glava, križna zareza, polno steblo, ozka toleranca, kratek navoj, iz titanove zlitine, anodizirani, z aluminijem pigmentiranim premazom – Klasifikacija: 1 100 MPa (pri temperaturi okolice) / 315 °C

General Information

Status
Published
Publication Date
06-Dec-2005
Withdrawal Date
29-Jun-2006
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 3 - Mechanical
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
07-Dec-2005
Completion Date
07-Dec-2005

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
Effective Date
22-Dec-2008
Effective Date
19-Jan-2023

Overview

EN 4496:2005 is a European Standard developed by the European Committee for Standardization (CEN) under the aerospace series. It specifies the detailed characteristics of aerospace screws featuring a 100° countersunk normal head, offset cruciform recess, a close tolerance normal shank, and a short thread, all manufactured from titanium alloy. These screws are anodized and coated with an aluminum pigmented layer, designed to withstand mechanical stresses of 1,100 MPa at ambient temperature and maintain performance up to 315 °C. This standard ensures consistent quality, interchangeability, and reliability in aerospace applications.

Key Topics

  • Screw Configuration and Dimensions
    The standard outlines precise geometrical configurations adhering to ISO 5856, with metric dimensions expressed in millimeters. It includes dimensional tolerances for shank diameter (before and after coating), thread profiles, and countersink angles, ensuring high precision manufacturing necessary for aerospace components.

  • Material and Strength Classification
    Screws covered by EN 4496:2005 are made of titanium alloy classified for strength at 1,100 MPa, ensuring high tensile resistance. The titanium alloy material meets aerospace-grade material properties specified in TR 3775.

  • Surface Treatment and Coatings
    The screws undergo anodizing with an aluminum pigmented coating per EN 4474 to provide corrosion resistance and durability under thermal stress up to 315 °C. Additional lubrication with cetyl alcohol as defined in MIL-L-87132B enhances installation performance and longevity.

  • Drive and Recess Design
    Featuring an offset cruciform recess compatible with ISO 7994 (Torq-Set) for rotary fastening devices, enabling secure and efficient torque application, reducing cam-out risk and ensuring consistent fastening forces.

  • Marking and Identification
    Marking requirements per EN 2424 include diameter codes and style indicators to facilitate easy identification and traceability of screws in aerospace assemblies.

  • Manufacturing and Quality Requirements
    Compliance with quality management systems such as EN 9100 and qualification procedures specified in EN 9133 is mandatory for manufacturers, ensuring high-quality production, testing, and certification of aerospace screws.

  • Oversized Bolts
    Provisions for oversized bolts are covered referencing EN 4016, relevant when specific application conditions require deviations in bolt dimensions.

Applications

EN 4496:2005 screws are critical for aerospace manufacturing and maintenance, where high strength, thermal resistance, and weight savings are paramount. Typical applications include:

  • Aircraft structural assemblies requiring high-strength fasteners with precision fit and finish.
  • Engine components exposed to elevated temperatures up to 315 °C.
  • Spacecraft instrumentation and payload fixation, where corrosion resistance and exact tolerances are crucial.
  • Helicopter frame assemblies and rotary wing structures, benefiting from titanium’s high strength-to-weight ratio.
  • Maintenance, repair, and overhaul operations in aerospace sectors, guaranteeing compatibility with existing standards and proven materials.

Related Standards

EN 4496:2005 works in conjunction with several key aerospace and material standards to deliver comprehensive specifications for aerospace screws:

  • ISO 5856 – Defines dimensions for screws, countersunk heads, and related characteristics.
  • ISO 7994 – Specifies offset cruciform recesses (Torq-Set) for secure fastener engagement.
  • TR 3775 – Provides material guidelines for titanium alloys used in aerospace bolts and pins.
  • EN 4474 – Specifies methods for aluminum pigmented coatings on aerospace hardware.
  • EN 2424 – Aerospace product marking standards essential for traceability.
  • EN 9100 & EN 9133 – Quality management and qualification standards ensuring consistent production quality.
  • MIL-L-87132B – Lubrication specification using cetyl alcohol for fastener installation.

Summary

EN 4496:2005 is a vital standard for aerospace manufacturers and suppliers focused on high-performance titanium alloy screws with exacting dimensional, mechanical, and surface treatment criteria. Its comprehensive guidance ensures screw performance and reliability in challenging aerospace environments, contributing to safety and durability across the aviation and space industries. By adhering to EN 4496, organizations enhance product interoperability, meet rigorous aerospace quality demands, and support advanced engineering solutions requiring titanium fasteners with superior strength and thermal stability.

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Frequently Asked Questions

EN 4496:2005 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Screws, 100° countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating - Classification: 1 100 MPa (at ambient temperature) / 315 °C". This standard covers: This standard specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating. Classification: 1 100 MPa / 315 °C

This standard specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating. Classification: 1 100 MPa / 315 °C

EN 4496:2005 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.

EN 4496:2005 has the following relationships with other standards: It is inter standard links to EN 14460:2006, EN 840-6:2004+A1:2008, EN 2424:2008, EN 4474:2024, EN 9133:2018, EN 9100:2018, EN 4496:2005/AC:2006, prEN 4496. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 4496:2005 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-2006
Aeronavtika – Vijaki, 100° ugrezna glava, križna zareza, polno steblo, ozka
toleranca, kratek navoj, iz titanove zlitine, anodizirani, z aluminijem pigmentiranim
premazom – Klasifikacija: 1 100 MPa (pri temperaturi okolice) / 315 °C
Aerospace series - Screws, 100° countersunk normal head, offset cruciform recess,
close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium
pigmented coating - Classification: 1 100 MPa (at ambient temperature) / 315 °C
Luft- und Raumfahrt - 100° -Senk-Passschrauben mit Flügelkreuzschlitz, kurzes
Gewinde aus Titanlegierung, anodisiert, mit aluminiumpigmentierter Beschichtung -
Klasse: 1 100 MPa (bei Raumtemperatur)/315 °C
Série aérospatiale - Vis a tete fraisée 100° normale, a empreinte cruciforme déportée, fut
normal a tolérance serrée, filetage court, en alliage de titane, anodisées, avec
revetement alumino-organique - Classification : 1 100 MPa (a température ambiante) /
315 °C
Ta slovenski standard je istoveten z: EN 4496:2005
ICS:
49.025.20 Aluminij Aluminium
49.025.30 Titan Titanium
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 4496
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2005
ICS 49.030.20
English Version
Aerospace series - Screws, 100° countersunk normal head,
offset cruciform recess, close tolerance normal shank, short
thread, in titanium alloy, anodized, with aluminium pigmented
coating - Classification: 1 100 MPa (at ambient temperature) /
315 °C
Série aérospatiale - Vis à tête fraisée 100° normale, à Luft- und Raumfahrt – 100° Senk-Paßschrauben, mit
empreinte cruciforme déportée, fût normal à tolérance Flügelkreuzschlitz, kurzes Gewinde, aus Titanlegierung,
serrée, filetage court, en alliage de titane, anodisées, avec anodisiert, mit Aluminium pigmenttete Beschichtung -
revêtement alumino-organique - Classification : 1 100 MPa Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °C
(à température ambiante) / 315 °C
This European Standard was approved by CEN on 26 October 2005.

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, 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
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4496:2005: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Required characteristics .5
4 Designation .8
5 Marking .8
6 Technical specification.9
7 Oversized bolts .9

Foreword
This European Standard (EN 4496:2005) has been prepared by the European Association of Aerospace
Manufacturers - Standardization (AECMA-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
AECMA, 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 June 2006, and conflicting national standards shall be withdrawn at
the latest by June 2006.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and the United Kingdom.
1 Scope
This standard specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess,
close tolerance normal shank, short thread, in titanium alloy, anodiz
...

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