EN 4845:2022
(Main)Aerospace series - Screw, 100° countersunk normal head, Spiral Drive Recess, short thread, in heat resisting steel FE-PA2601 (A286), passivated - Classification: 900 MPa (at ambient temperature)/650 °C
Aerospace series - Screw, 100° countersunk normal head, Spiral Drive Recess, short thread, in heat resisting steel FE-PA2601 (A286), passivated - Classification: 900 MPa (at ambient temperature)/650 °C
This document specifies the characteristics of externally threaded fasteners, 100° countersunk normal
head, Spiral Drive Recess, short thread, in heat resisting steel FE-PA2601, passivated, for aerospace
applications.
Classification: 900 MPa
1/650 °C2.
Luft- und Raumfahrt - 100° Senkkopfschraube mit Spiral-Antrieb, kurzes Gewinde, aus hochwarmfestem Stahl FE PA2601 (A286), passiviert - Klasse: 900 MPa (bei Raumtemperatur)/650 °C
Dieses Dokument legt die Eigenschaften von Verbindungselementen mit Außengewinde, 100°-Senkkopfschraube, Spiral-Antrieb, kurzes Gewinde, aus hochwarmfestem Stahl FE PA2601, passiviert, für Luft- und Raumfahrtanwendungen fest.
Klasse: 900 MPa /650 °C .
Série aérospatiale - Vis à tête fraisée normale 100°, empreinte en spirale, filetage court, en acier résistant à chaud FE-PA2601 (A286), passivée - Classification : 900 MPa (à température ambiante)/650 °C
Aeronavtika - Vijak, 100° ugrezna glava, spiralna vdolbina, kratek navoj, iz toplotno odpornega jekla FE-PA2601 (A286), pasiviran - Klasifikacija: 900 MPa (pri temperaturi okolice)/650 °C
Ta dokument določa značilnosti zunanjih navojnih veznih elementov – 100° ugrezna glava, spiralna vdolbina, kratek navoj, iz toplotno odpornega jekla FE-PA2601 (A286), pasiviranih – za uporabo v aeronavtiki.
Klasifikacija: 900 MPa/650 °C.
General Information
Overview
EN 4845:2022 is a European standard developed by CEN and ASD-STAN for aerospace fasteners. It specifies the technical requirements and classification of an externally threaded screw with a 100° countersunk normal head, Spiral Drive Recess, and short thread. This fastener is made from heat resisting steel FE-PA2601 (commonly known as A286), passivated to improve corrosion resistance. It is classified to withstand a tensile strength of 900 MPa at ambient temperature and maintain performance up to 650 °C.
This standard provides critical guidance for manufacturing and quality assurance of aerospace-grade screws, supporting high-temperature durability and mechanical reliability essential for aerospace applications.
Key Topics
Screw Configuration and Dimensions
The standard details precise thread dimensions, head shape, and recess design based on ISO and EN norms. Dimensions such as thread diameter, recess gauge, and overall length are standardized, ensuring interchangeability and reliability. Tight tolerances on form and position per ISO 7913 safeguard fitting accuracy.Material Specifications
The screw material FE-PA2601 (A286) is a heat resisting steel specified under EN 2399 or EN 3639. The metal is passivated according to EN 2516 to provide enhanced corrosion resistance vital for aerospace environments.Surface Texture and Treatment
The fastener undergoes passivation, and critical bearing surfaces require specific roughness levels (Ramax 0.8 μm) to ensure reliable torque transfer and mechanical stability. Other surfaces have a roughness up to Ramax 3.2 μm, balancing performance and manufacturing feasibility.Marking and Identification
Marking is standardized per EN 2424 and EN 4609, with indented alphanumeric codes indicating drive type, diameter, and manufacturing details, ensuring traceability across the aerospace supply chain.Quality and Compliance
Manufacturer approval requires an aerospace-standard quality management system (e.g., EN 9100) to guarantee production processes meet rigorous aerospace safety and performance standards. Qualification testing follows EN 9133 or equivalent, confirming fasteners meet strength and thermal performance criteria.Patent Note
The Spiral Drive Recess used in this screw may be subject to patent EP1025370B1, owned by Phillips Screw Company, highlighting the importance of licensing considerations for manufacturers and users.
Applications
EN 4845:2022 fasteners are integral components in aerospace engineering, specifically designed for use in harsh, high-temperature environments found in aircraft engines, airframes, and related defense equipment. Their heat resistance up to 650 °C and high tensile strength of 900 MPa make them suitable for:
- Jet engine assemblies requiring durable, heat-resistant fastening solutions
- Structural aerospace components where countersunk heads provide flush surfaces for aerodynamic efficiency
- High-performance defense aerospace hardware needing corrosion-resistant and reliable threaded fasteners
- Replacement and maintenance parts compliant with aerospace quality assurance standards
The standardized dimensions and material specs also enable global supply chain compatibility and contribute to regulatory safety compliance in aerospace manufacturing.
Related Standards
- EN 2399 – Heat resisting steel FE-PA2601 bars for forged bolts
- EN 2516 – Passivation of corrosion resisting steels
- EN 2576 – Technical specification for bolts in FE-PA2601 steel
- EN 4609 – Spiral drive recess geometrical definitions and requirements
- EN 2424 – Aerospace product marking requirements
- ISO 3353-1 – Rolled external threads for aerospace lead and runout threads
- ISO 7913 – Bols and screws tolerances for form and position
- EN 9100 – Quality management systems for aviation, space and defense organizations
- EN 9133 – Qualification procedures for aerospace standard products
These standards collectively ensure comprehensive coverage of material properties, manufacturing precision, surface treatment, quality management, and product identification critical for aerospace screw usage.
Keywords: EN 4845:2022, aerospace screw standard, heat resisting steel FE-PA2601, A286 screw, 100° countersunk screw, Spiral Drive Recess, high-temperature fastener, aerospace threaded fasteners, aerospace quality management, aerospace fastener dimensions, passivated steel aerospace screw, aerospace bolt standards, aviation fasteners.
Frequently Asked Questions
EN 4845:2022 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Screw, 100° countersunk normal head, Spiral Drive Recess, short thread, in heat resisting steel FE-PA2601 (A286), passivated - Classification: 900 MPa (at ambient temperature)/650 °C". This standard covers: This document specifies the characteristics of externally threaded fasteners, 100° countersunk normal head, Spiral Drive Recess, short thread, in heat resisting steel FE-PA2601, passivated, for aerospace applications. Classification: 900 MPa 1/650 °C2.
This document specifies the characteristics of externally threaded fasteners, 100° countersunk normal head, Spiral Drive Recess, short thread, in heat resisting steel FE-PA2601, passivated, for aerospace applications. Classification: 900 MPa 1/650 °C2.
EN 4845:2022 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.
You can purchase EN 4845:2022 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2022
Aeronavtika - Vijak, 100° ugrezna glava, spiralna vdolbina, kratek navoj, iz toplotno
odpornega jekla FE-PA2601 (A286), pasiviran - Klasifikacija: 900 MPa (pri
temperaturi okolice)/650 °C
Aerospace series - Screw, 100° countersunk normal head, Spiral Drive Recess, short
thread, in heat resisting steel FE-PA2601 (A286), passivated - Classification: 900 MPa
(at ambient temperature)/650 °C
Luft- und Raumfahrt - 100° Senkschraube mit Spiral-Antrieb, kurzes Gewinde, aus
hochwarmfestem Stahl FE-PA2601 (A286), passiviert - Klasse: 900 MPa (bei
Raumtemperatur)/650 °C
Série aérospatiale - Vis à tête fraisée normale 100°, empreinte en spirale, filetage court,
en acier résistant à chaud FE-PA2601 (A286), passivée - Classification : 900 MPa (à
température ambiante)/650 °C
Ta slovenski standard je istoveten z: EN 4845:2022
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 4845
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 49.030.20
English Version
Aerospace series - Screw, 100° countersunk normal head,
Spiral Drive Recess, short thread, in heat resisting steel FE-
PA2601 (A286), passivated - Classification: 900 MPa (at
ambient temperature)/650 °C
Série aérospatiale - Vis à tête fraisée normale 100°, Luft- und Raumfahrt - 100° Senkschraube mit Spiral-
empreinte en spirale, filetage court, en acier résistant à Antrieb, kurzes Gewinde, aus hochwarmfestem Stahl
chaud FE-PA2601 (A286), passivée - Classification : FE-PA2601 (A286), passiviert - Klasse: 900 MPa (bei
900 MPa (à température ambiante)/650 °C Raumtemperatur)/650 °C
This European Standard was approved by CEN on 10 January 2022.
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, Turkey 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4845:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements . 6
4.1 Configuration — Dimensions — Masses . 6
4.2 Tolerances of form and position . 8
4.3 Materials . 8
4.4 Surface treatment . 8
5 Designation . 8
6 Marking . 8
7 Technical specification . 9
Bibliography. 10
European foreword
This document (EN 4845:2022) 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 Standard
has received the approval of the National Associations and the Official Services of the member
countries of ASD, 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 2022, and conflicting national standards shall
be withdrawn at the latest by September 2022.
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.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
the United Kingdom.
Introduction
Aerospace and Defence Standard
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