EN 4075:2025

Aerospace series - Screw, pan head, offset cruciform recess, threaded to head, in corrosion resisting steel, passivated, metric - Classification: 490 MPa (at ambient temperature)/425 °C

This document specifies the characteristics of screws, pan head, offset cruciform recess, threaded to head, in corrosion resisting steel, passivated, metric.
Classification: 490 MPa /425 °C

Luft- und Raumfahrt - Flachkopfschraube, mit Flügelkreuzschlitz, Gewinde annähernd bis Kopf, aus korrosionsbeständigem Stahl, passiviert, metrisch - Klasse: 490 MPa (bei Umgebungstemperatur)/425 °C

Série aérospatiale - Vis à tête cylindrique, à empreinte cruciforme déportée, filetée jusqu‘à proximité de la tête, en acier résistant à la corrosion, passivée, série métrique - Classification : 490 MPa (à température ambiante)/425 °C

Le présent document spécifie les caractéristiques des vis à tête cylindrique, à empreinte cruciforme déportée, filetées jusqu'à proximité de la tête, en acier résistant à la corrosion, passivées, série métrique.
Classification : 490 MPa /425 °C.

Aeronavtika - Vijaki, valjasta glava, križna zareza, z navojem do glave, iz korozijsko odpornega jekla, pasivirani, metrični - Klasifikacija: 490 MPa (pri temperaturi okolice) / 425 °C

Ta dokument določa značilnosti vijakov: valjasta glava, križna zareza, z navojem do glave, iz korozijsko odpornega jekla, pasiviranih, metričnih. Klasifikacija: 490 MPa/425 °C

General Information

• Status: Published
• Publication Date: 25-Mar-2025
• ICS: 49.030.20 - Bolts, screws, studs
• 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: 26-Mar-2025
• Completion Date: 26-Mar-2025
• Ref Project: SIST EN 4075:2025 - Aerospace series - Screws, pan head, offset cruciform recess, threaded to head, in corrosion resisting steel, passivated, metric - Classification: 490 MPa (at ambient temperature) / 425 °C

Relations

• Replaces: EN 4075:2008 - Aerospace series - Screws, pan head, offset cruciform recess, threaded to head, in corrosion resisting steel, passivated - Classification: 490 MPa (at ambient temperature) / 425 °C
• Effective Date: 25-Oct-2023

Overview

EN 4075:2025 is a CEN / ASD‑STAN aerospace standard that defines the characteristics of pan head screws with an offset cruciform recess, threaded to the head, made from corrosion‑resisting steel, passivated, metric. The parts are classified for a minimum tensile strength of 490 MPa (ambient) and a maximum allowable temperature of 425 °C (surface‑treatment dependent). EN 4075:2025 supersedes EN 4075:2008 and was approved by CEN in January 2025.

Key topics and technical requirements

• Configuration, dimensions and masses: Sizes, head and thread geometry, and mass data follow the standard’s Figure 1 and Table 1 and reference ISO 3202 for metric MJ thread dimensions.
• Tolerances: Form and position tolerances reference ISO 7913; dimensional tolerances apply after surface treatment.
• Materials: Corrosion‑resisting steel as specified in TR 3775 (classification 490 MPa).
• Surface treatment: Passivation per EN 2516; surface roughness requirements:
  • bearing surfaces (underhead, fillet, shank, thread): Ramax = 0.8 µm
  • other surfaces: Ramax = 3.2 µm
  • break sharp edges to 0.1–0.4 mm
• Drive and marking: Drive codes follow ISO 14275 / ISO 14276; marking style follows EN 2424 with diameter‑based conventions.
• Designation: Structured part numbering (example: SCREW EN 4075‑050 040 A) indicating document, diameter code, length code and drive code.
• Manufacturer approval and quality: Manufacturers must be approved aerospace production organizations with a quality management system (e.g. EN 9100 or equivalent). Technical specification references ISO 8168 with modifications:
  • microstructure inspection must include discontinuity checks
  • classification of defects uses an AQL of 1% (replacing 0.065%)
• Not included: EN 4075:2025 removes some previous requirements (qualification of screws, tensile strength testing, double shear strength, tension fatigue strength) from its mandated checks.

Applications and users

EN 4075:2025 is intended for use wherever metric, corrosion‑resisting, passivated pan‑head screws with offset cruciform drives are required in aerospace applications. Typical users:

• aerospace design and structural engineers specifying fasteners
• OEM procurement and supply chain teams
• aerospace fastener manufacturers and quality managers
• maintenance, repair and overhaul (MRO) organizations ensuring compliance
• certification and compliance teams verifying part designation and marking

Related standards

• EN 2516 (passivation of corrosion‑resisting steels)
• ISO 3202 (dimensions for pan‑head screws MJ threads)
• ISO 7913 (tolerances of form and position)
• ISO 8168 (procurement/specification for MJ threads)
• EN 2424 (marking of aerospace products)
• TR 3775 (materials guidance)
• EN 9100 (aerospace quality management)

Keywords: EN 4075:2025, aerospace screw standard, pan head screw, offset cruciform recess, corrosion resisting steel, passivated, metric fasteners, 490 MPa, 425 °C.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2024
Aeronavtika - Vijaki, valjasta glava, križna zareza, z navojem do glave, iz korozijsko
odpornega jekla, pasivirani, metrični - Klasifikacija: 490 MPa (pri temperaturi
okolice) / 425 °C
Aerospace series - Screws, pan head, offset cruciform recess, threaded to head, in
corrosion resisting steel, passivated, metric - Classification: 490 MPa (at ambient
temperature) / 425 °C
Luft- und Raumfahrt - Flachkopfschraube, mit Flügelkreuzschlitz, Gewinde annähernd
bis Kopf, aus korrosionsbeständigem Stahl, passiviert, metrisch - Klasse: 490 MPa (bei
Umgebungstemperatur)/425 °C
Série aérospatiale - Vis à tête cylindrique, à empreinte cruciforme déportée, filetée
jusqu‘à proximité de la tête, en acier résistant à la corrosion, passivée, série métrique -
Classification : 490 MPa (à température ambiante)/425 °C
Ta slovenski standard je istoveten z: EN 4075:2025
ICS:
49.025.10 Jekla Steels
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 4075
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2025
EUROPÄISCHE NORM
ICS 49.030.20 Supersedes EN 4075:2008
English Version
Aerospace series - Screw, pan head, offset cruciform
recess, threaded to head, in corrosion resisting steel,
passivated, metric - Classification: 490 MPa (at ambient
temperature)/425 °C
Série aérospatiale - Vis à tête cylindrique, à empreinte Luft- und Raumfahrt - Flachkopfschraube, mit
cruciforme déportée, filetée jusqu'à proximité de la Flügelkreuzschlitz, Gewinde annähernd bis Kopf, aus
tête, en acier résistant à la corrosion, passivée, série korrosionsbeständigem Stahl, passiviert, metrisch -
métrique - Classification : 490 MPa (à température Klasse: 490 MPa (bei Umgebungstemperatur)/425 °C
ambiante)/425 °C
This European Standard was approved by CEN on 20 January 2025.

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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4075:2025 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 – Masses . 5
4.2 Tolerances of form and position . 5
4.3 Materials . 5
4.4 Surface treatment . 5
5 Designation . 6
6 Marking . 7
7 Technical specification . 7
7.1 General. 7
7.2 Approval of manufacturers . 7
7.3 Requirements deleted . 7
Bibliography . 8

European foreword
This document (EN 4075:2025) 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 September 2025, and conflicting national standards
shall be withdrawn at the latest by September 2025.
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.
This document supersedes EN 4075:2008.
This document includes the following significant technical changes with respect to EN 4075:2008:
— normative references updated;
— Clause 3 “Terms and definitions” added;
— Figure 1 updated;
— Table 2 updated with new drive code references;
— 7.2 “Ap
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