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
- Not Published
- Publication Date
- 01-Sep-2026
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3/S 2 - Fasteners
- Current Stage
- 5060 - Closure of Vote - Formal Approval
- Start Date
- 02-Jul-2026
- Completion Date
- 02-Jul-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
- 23-Apr-2024
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Frequently Asked Questions
EN 4509:2026 is a draft 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 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
oSIST prEN 4509:2024
01-december-2024
Aeronavtika - Vijak, s 100° ugrezno glavo, križno zarezo, z navojem do glave, iz
titanove zlitine, anodiziran, z aluminijevim pigmentiranim premazom, metrična
serija - Klasifikacija: 1 100 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: prEN 4509
ICS:
49.025.20 Aluminij Aluminium
49.025.30 Titan Titanium
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
oSIST prEN 4509:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 4509:2024
oSIST prEN 4509:2024
DRAFT
EUROPEAN STANDARD
prEN 4509
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2024
ICS 49.030.20 Will supersede EN 4509:2006
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, filetées jusqu'à Flügelkreuzschlitz, Gewinde annähernd bis Kopf, aus
proximité de la tête, en alliage de titane, anodisées, Titanlegierung, anodisiert, mit Aluminium
avec 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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4509:2024 E
worldwide for CEN national Members.
oSIST prEN 4509:2024
prEN 4509:2024 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 4
4.1 Configuration – Dimensions – Masses . 4
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
oSIST prEN 4509:2024
prEN 4509:2024 (E)
European foreword
This document (prEN 4509:2024) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardization (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 document is currently submitted to the CEN Enquiry.
This document will supersede EN 4509:2006.
prEN 4509:2024 includes the following significant technical changes with respect to EN 4509:200
...