FprEN 4509
(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
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 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 .
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
Dieses Dokument legt die Eigenschaften von 100°-Senkschrauben mit Flügelkreuzschlitz, Gewinde annähernd bis Kopf, aus Titanlegierung, anodisiert, mit Aluminium pigmentierter Beschichtung der metrischen Reihe fest.
Klasse: 1 100 MPa1/315 °C2.
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
Le présent document spécifie les caractéristiques des 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 /315 °C.
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
General Information
- Status
- Not Published
- Publication Date
- 04-Oct-2026
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3/S 2 - Fasteners
- Current Stage
- 4599 - Dispatch of FV draft to CMC - Finalization for Vote
- Start Date
- 11-Mar-2026
- Completion Date
- 11-Mar-2026
Relations
- Effective Date
- 23-Apr-2024
Overview
FprEN 4509 is a European standard developed by CEN for aerospace fasteners, specifically screws with a 100° countersunk normal head, offset cruciform recess, and full-length threading to the head. These screws are manufactured from titanium alloy, anodized, and coated with an aluminium pigmented finish. The standard applies to metric series screws classified for a minimum tensile strength of 1 100 MPa at ambient temperature and suitable for operational use up to 315 °C.
This standard replaces EN 4509:2006 and provides comprehensive requirements regarding configuration, materials, coatings, and marking to ensure uniform quality and interoperability within aerospace applications.
Key Topics
Screw Design & Characteristics
- 100° countersunk normal head for aerodynamic profile and precise fitment
- Offset cruciform (cross) recess for secure tool engagement
- Threaded to the screw head, ensuring maximum engagement length in assemblies
Material Specifications
- Titanium alloy (as per TR 3775), known for high strength-to-weight ratio and corrosion resistance, critical in aerospace environments
- Minimum tensile strength: 1 100 MPa at ambient temperature
- Anodized for enhanced durability and corrosion protection
Coating & Surface Treatment
- Aluminium pigmented coating applied according to EN 4474 for additional protection and recognition
- Lubrication using chlorine-free cetylic alcohol as specified by MIL-L-87132B
- Surface roughness and finish requirements aligned with aerospace tolerances (ISO 7913)
Marking & Traceability
- Markings follow the guidelines of EN 2424, ensuring product traceability and compliance
Quality & Manufacturing
- Manufacturing organizations must operate under an approved aerospace quality management system (e.g., EN 9100)
- Qualification procedures in line with EN 9133 to guarantee product reliability
Applications
FprEN 4509 screws are specialized fastening components designed for advanced aerospace assemblies. Practical applications include:
- Aircraft Structures: Used in critical assemblies where flush mounting, high strength, and weight optimization are crucial.
- Engines & Powerplants: Suitable for high-temperature environments and components requiring robust mechanical performance.
- Spacecraft: Titanium alloy’s corrosion resistance and high tensile strength make these screws ideal for lightweight, high-performance satellite and launcher hardware.
- Defense Systems: Meets stringent aerospace defense requirements for reliability and part interchangeability.
These screws help ensure safety, structural integrity, and ease of maintenance in high-performance aerospace applications.
Related Standards
For organizations and engineers working with FprEN 4509-compliant screws, the following standards are closely related:
- EN 2424 - Marking of aerospace products
- EN 4474 - Aluminium pigmented coatings for aerospace use
- ISO 5855-2 - Limit dimensions for MJ threads in bolts and nuts
- ISO 7913 - Tolerances of form and position for aerospace bolts and screws
- ISO 9152 - Procurement and technical specifications for titanium alloy bolts
- ISO 14275 / ISO 14276 - Drive configurations for offset cruciform recesses
- EN 9100 - Quality management for aviation, space, and defense organizations
- EN 9133 - Qualification procedure for aerospace standard products
FprEN 4509 contributes to the consistent quality, safety, and compatibility of aerospace fasteners across international supply chains. Its adoption helps streamline certification and procurement processes, while supporting long-term reliability in advanced engineering applications.
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Frequently Asked Questions
FprEN 4509 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 .
FprEN 4509 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.
FprEN 4509 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.
FprEN 4509 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-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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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.
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
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
...
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