EN 4509:2026
(Main)Aerospace series - Screw, 100° countersunk normal head, offset cruciform recess, threaded to head, in titanium alloy, anodized, with aluminium pigmented coating, metric series - Classification: 1 100 MPa (at ambient temperature)/315 °C
General Information
- Abstract
This document specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, threaded to head, in titanium alloy, anodized, with aluminium pigmented coating, metric series.
Classification: 1 100 MPa /315 °C .
- Status
- Published
- Publication Date
- 01-Sep-2026
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3/S 2 - Fasteners
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 02-Sep-2026
- Completion Date
- 02-Sep-2026
Overview
EN 4509:2026 is a European standard developed by CEN for the aerospace sector, specifically addressing the requirements for screws with a 100° countersunk normal head, offset cruciform recess, threaded to head, made from titanium alloy, and finished with both anodization and an aluminium pigmented coating. The standard covers the metric series of these screws, classified to a tensile strength of 1 100 MPa at ambient temperature and suitable for applications up to 315 °C. This document ensures uniformity, reliability, and safety in the design and use of high-performance aerospace fasteners.
Key Topics
- Screw Characteristics:
Defines screws with 100° countersunk heads and offset cruciform recess, providing secure and flush fitting for aerodynamic and structural performance. - Material Specification:
Titanium alloy (strength class 1 100 MPa), offering high strength-to-weight ratio and corrosion resistance, essential for aerospace environments. - Surface Treatment:
Anodized and aluminium pigmented coatings improve durability, corrosion resistance, and compatibility with other aerospace materials. - Thread Details:
Fully threaded to the head in the metric series, facilitating versatile installation and mechanical engagement. - Qualification and Marking:
Specifies required markings, traceability, and quality management standards in line with ISO and EN series to assure compliance and product integrity.
Applications
EN 4509:2026 standard screws are widely used across the aerospace industry due to their advanced features:
- Aircraft Structural Assemblies:
Utilized in fuselage panels, control surfaces, cabin interiors, and other locations requiring strong, flush, and corrosion-resistant fasteners. - Engine Components:
Suitable for high-temperature zones, such as engine mounts or assemblies exposed to 315 °C, thanks to the titanium alloy and specialized coatings. - Spacecraft and Satellites:
Employed where weight savings, strength, and resistance to extreme conditions are critical. - Defence and Avionics:
Appropriate for military aircraft, drones, and sensitive avionics equipment that require strict adherence to high performance and safety standards.
These applications benefit from the standardized dimensioning, tolerances, and performance requirements outlined in EN 4509:2026, supporting efficient maintenance, interoperability, and safety.
Related Standards
Integration with other international aerospace fastener standards enhances the value of EN 4509:2026:
- EN 2424: Marking of aerospace products, ensuring traceability and compliance.
- EN 4474: Coating methods for aluminium pigmented coatings, supporting corrosion resistance.
- ISO 5855-2: MJ threads - Ensures compatibility and uniformity with other metric series aerospace bolts and screws.
- ISO 7913: Tolerances of form and position for bolts and screws.
- ISO 9152: Procurement specification for bolts, in particular those made of titanium alloys, aligning with the strength classification.
- ISO 14275 / ISO 14276: Standards for offset cruciform drives, codifying mechanical engagement.
- EN 9100 & EN 9133: Quality management and qualification procedures for aerospace products.
Practical Value
Adherence to EN 4509:2026 supports standardization and quality assurance in aerospace manufacturing and maintenance:
- Guarantees fastener interchangeability, improving supply chain efficiency.
- Reduces risk of material or design incompatibility through strict material and coating requirements.
- Enhances lifecycle management by supporting traceability and robust quality management.
- Supports compliance with industry and regulatory requirements for aerospace safety and reliability.
By following EN 4509:2026, manufacturers, engineers, and operators ensure the high performance and reliability demanded by aerospace applications are consistently met, supporting safer skies and more dependable aerospace systems.
Relations
- Effective Date
- 30-Sep-2026
- Effective Date
- 30-Sep-2026
- Effective Date
- 30-Sep-2026
- Effective Date
- 30-Sep-2026
- Effective Date
- 30-Sep-2026
- Effective Date
- 30-Sep-2026
- Effective Date
- 30-Sep-2026
- Effective Date
- 30-Sep-2026
- Effective Date
- 23-Apr-2024
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Frequently Asked Questions
EN 4509:2026 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Screw, 100° countersunk normal head, offset cruciform recess, threaded to head, in titanium alloy, anodized, with aluminium pigmented coating, metric series - Classification: 1 100 MPa (at ambient temperature)/315 °C". This standard covers: This document specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, threaded to head, in titanium alloy, anodized, with aluminium pigmented coating, metric series. Classification: 1 100 MPa /315 °C .
This document specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, threaded to head, in titanium alloy, anodized, with aluminium pigmented coating, metric series. Classification: 1 100 MPa /315 °C .
EN 4509:2026 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 4509:2026 has the following relationships with other standards: It is inter standard links to ISO 3353-1:2020, ISO 14276:2002, ISO 14275:2002, ISO 7913:1994, ISO 5855-2:1999, EN 4473:2024, EN 2424:2008, ISO 9152:1998, EN 4509:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 4509:2026 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-november-2026
Aeronavtika - Vijak, s 100° ugrezno glavo, križno zarezo, z navojem do glave, iz
titanove zlitine, anodiziran, z aluminijevim pigmentiranim premazom, metrična
serija - Klasifikacija: 1100 MPa (pri temperaturi okolice)/315 °C
Aerospace series - Screw, 100° countersunk normal head, offset cruciform recess,
threaded to head, in titanium alloy, anodized, with aluminium pigmented coating, metric
series - Classification: 1 100 MPa (at ambient temperature)/315 °C
Luft- und Raumfahrt - 100° Senkschraube, mit Flügelkreuzschlitz, Gewinde annähernd
bis Kopf, aus Titanlegierung, anodisiert, mit Aluminium pigmentierter Beschichtung,
metrische Reihe - Klasse: 1 100 MPa (bei Raumtemperatur)/315 °C
Série aérospatiale - Vis à tête fraisée 100° normale, à empreinte cruciforme déportée,
filetées jusqu'à proximité de la tête, en alliage de titane, anodisées, avec revêtement
alumino-organique, série métrique - Classification : 1 100 MPa (à température
ambiante)/315 °C
Ta slovenski standard je istoveten z: EN 4509:2026
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.
EN 4509
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2026
EUROPÄISCHE NORM
ICS 49.030.20
English Version
Aerospace series - Screw, 100° countersunk normal head,
offset cruciform recess, threaded to head, in titanium alloy,
anodized, with aluminium pigmented coating, metric
series - Classification: 1 100 MPa (at ambient
temperature)/315 °C
Série aérospatiale - Vis à tête fraisée 100° normale, à Luft- und Raumfahrt - 100° Senkschraube, mit
empreinte cruciforme déportée, filetée jusqu'à Flügelkreuzschlitz, Gewinde annähernd bis Kopf, aus
proximité de la tête, en alliage de titane, anodisée, avec Titanlegierung, anodisiert, mit Aluminium
revêtement alumino-organique, série métrique - pigmentierter Beschichtung, metrische Reihe - Klasse:
Classification : 1 100 MPa (à température 1 100 MPa (bei Raumtemperatur)/315 °C
ambiante)/315 °C
This European Standard was approved by CEN on 3 August 2026.
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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4509:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 5
4.1 Configuration — Dimensions Mass . 5
4.2 Tolerances of form and position . 5
4.3 Materials . 5
4.4 Surface treatments . 5
5 Designation . 8
6 Marking . 8
7 Technical specification . 8
7.1 General. 8
7.2 Approval of manufacturers . 8
7.3 Qualification of screws . 9
Bibliography . 10
European foreword
This document (EN 4509:2026) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, 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 March 2027, and conflicting national standards shall
be withdrawn at the latest by March 2027.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can
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