EN 4847:2022
(Main)Aerospace series - Screw, pan head, Spiral Drive Recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa (at ambient temperature)/235 °C
Aerospace series - Screw, pan head, Spiral Drive Recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa (at ambient temperature)/235 °C
This document specifies the characteristics of externally threaded fasteners, pan head, Spiral Drive
Recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated, for
aerospace applications.
Classification: 1 100 MPa1/235 °C2.
Luft- und Raumfahrt - Flachkopfschraube mit Spiral-Antrieb, grobe Schafttoleranz, mittlere Gewindelänge, aus legiertem Stahl, verkadmet - Klasse: 1 100 MPa (bei Raumtemperatur)/235 °CC
Dieses Dokument legt die Eigenschaften von Verbindungselementen mit Außengewinde, Flachkopfschraube, Spiral-Antrieb, grobe Schafttoleranz, mittellanges Gewinde, aus legiertem Stahl, kadmiert, für Luft- und Raumfahrtanwendungen fest.
Klasse: 1 100 MPa /235 °C .
Série aérospatiale - Vis à tête cylindrique, empreinte en spirale, tige normale à tolérance large, filetage moyen, en acier allié, cadmiée - Classification : 1 100 MPa (à température ambiante)/235 °C
Aeronavtika - Vijak, valjasta glava, spiralna vdolbina, široka toleranca, srednja navojna dolžina, iz legiranega jekla, kadmiran - Klasifikacija: 1100 MPa (pri temperaturi okolice)/235 °C
Ta dokument določa značilnosti zunanjih navojnih veznih elementov – valjasta glava, spiralna vdolbina, široka toleranca, srednja navojna dolžina, iz legiranega jekla, kadmiranih – za uporabo v aeronavtiki.
Klasifikacija: 1100 MPa/235 °C.
General Information
Overview
EN 4847:2022 is a European standard established by CEN, specifying requirements for aerospace series screws featuring a pan head with a Spiral Drive Recess. These externally threaded fasteners are designed with coarse tolerance normal shanks and medium length threads, manufactured from alloy steel and cadmium plated for enhanced corrosion resistance. Classified to withstand a minimum tensile strength of 1,100 MPa at ambient temperature and operate reliably at temperatures up to 235 °C, these screws are essential components in aerospace engineering and defense applications where high mechanical performance and strict quality standards are critical.
Key Topics
Fastener Configuration and Dimensions
EN 4847 defines detailed geometric and dimensional specifications, including head diameter, thread length, and shank tolerance. Dimensions are expressed in millimeters and apply after surface treatments, with strict surface roughness requirements to ensure optimal mechanical performance.Material Specifications
The screws must be made from alloy steels conforming to EN 2137 or EN 3514 standards to guarantee strength and durability under demanding service conditions.Surface Treatment
Cadmium plating is mandatory, achieving a coating thickness between 8 µm and 14 µm on contact surfaces. Various post-treatment options, such as hexavalent chromium coatings or transparent conversion coatings, are specified for corrosion protection and compliance with aerospace longevity requirements.Tolerances and Quality Control
Form and position tolerances follow ISO 7913, ensuring consistency and interchangeability. The standard emphasizes quality management systems compliant with EN 9100 or equivalent aerospace standards to maintain manufacturing excellence.Marking and Identification
The standard outlines indented marking procedures for traceability, including diameter codes and drive codes compliant with EN 4609 and EN 2424, facilitating reliable identification in complex aerospace assemblies.Technical Specifications and Approval
Manufacturers must be approved aerospace production organizations with documented quality management systems. The fasteners undergo qualification testing per EN 9133 or equivalent protocols, confirming their suitability for aerospace use.
Applications
EN 4847:2022 screws are tailored for aerospace and defense sectors, where components face rigorous mechanical and environmental stresses. Typical applications include:
- Aircraft structural assemblies requiring high-strength fastening solutions
- Engine mountings and airframe components operating under varying temperature conditions
- Defense systems that necessitate reliable, corrosion-resistant fasteners for safety-critical joints
- Aerospace maintenance, repair, and overhaul operations demanding standardized replacement parts
Their design specifically addresses the need for robust mechanical performance, corrosion resistance, and precise fit in demanding aerospace environments.
Related Standards
EN 4847:2022 interacts with several critical standards to ensure comprehensive quality and compatibility:
- EN 2133 - Aerospace series cadmium plating specifications for steels
- EN 2137/EN 3514 - Material specifications for high-strength alloy steels used in fasteners
- EN 4609 - Defines Spiral Drive recess geometry and technical requirements
- ISO 3353-1 - Standards for rolled external threads on aerospace fasteners
- ISO 7689 - Procurement specifications for aerospace bolts of 1100 MPa strength class
- ISO 7913 - Tolerances of form and position for aerospace bolts and screws
- EN 2424 - Marking requirements for aerospace products
- EN 9100 - Quality management systems for aviation, space, and defense organizations
- EN 9133 - Qualification procedures for aerospace standard products
These interconnected standards establish a framework that guarantees the performance, reliability, and traceability of aerospace fasteners under EN 4847.
By adhering to EN 4847:2022, aerospace manufacturers and suppliers ensure consistent quality, reliability, and safety of pan head Spiral Drive screws used in critical applications, meeting the stringent demands of the aerospace and defense industries. This standard supports optimal fastener selection, quality assurance, and regulatory compliance for advanced aerospace engineering projects.
Frequently Asked Questions
EN 4847:2022 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Screw, pan head, Spiral Drive Recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa (at ambient temperature)/235 °C". This standard covers: This document specifies the characteristics of externally threaded fasteners, pan head, Spiral Drive Recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated, for aerospace applications. Classification: 1 100 MPa1/235 °C2.
This document specifies the characteristics of externally threaded fasteners, pan head, Spiral Drive Recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated, for aerospace applications. Classification: 1 100 MPa1/235 °C2.
EN 4847:2022 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 4847:2022 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, valjasta glava, spiralna vdolbina, široka toleranca, srednja
navojna dolžina, iz legiranega jekla, kadmiran - Klasifikacija: 1100 MPa (pri
temperaturi okolice)/235 °C
Aerospace series - Screw, pan head, Spiral Drive Recess, coarse tolerance normal
shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa
(at ambient temperature)/235 °C
Luft und Raumfahrt - Flachkopfschraube mit Spiral Antrieb, grobe Schafttoleranz,
mittlere Gewindelänge, aus legiertem Stahl, kadmiert - Klasse: 1 100 MPa (bei
Raumtemperatur)/235 °C
Série aérospatiale - Vis à tête cylindrique, empreinte en spirale, tige normale à tolérance
large, filetage moyen, en acier allié, cadmiée - Classification : 1 100 MPa (à température
ambiante)/235 °C
Ta slovenski standard je istoveten z: EN 4847:2022
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 4847
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 49.030.20
English Version
Aerospace series - Screw, pan head, Spiral Drive Recess,
coarse tolerance normal shank, medium length thread, in
alloy steel, cadmium plated - Classification: 1 100 MPa (at
ambient temperature)/235 °C
Série aérospatiale - Vis à tête cylindrique, empreinte en Luft und Raumfahrt - Flachkopfschraube mit Spiral
spirale, tige normale à tolérance large, filetage moyen, Antrieb, grobe Schafttoleranz, mittlere Gewindelänge,
en acier allié, cadmiée - Classification : 1 100 MPa (à aus legiertem Stahl, kadmiert - Klasse: 1 100 MPa (bei
température ambiante)/235 °C Raumtemperatur)/235 °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 4847:2022 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 . 9
6 Marking . 9
7 Technical specification . 10
Bibliography. 11
European foreword
This document (EN 4847:2022) 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 Standardisation (ASD-STAN) draws attention to the fact that it is claimed that
compliance with this document may involve the use of a patent “Spiral Drive System for Threaded
Fasteners” EP1025370B1.
ASD-STAN takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured ASD-STAN that he/she is willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this
respect, the statement of the holder of this patent right is registered with ASD-STAN. Information may be
obtained from:
Phillips Screw Company
301 Edgewater Drive, Suite 320
Wakefield, Massachusetts 01880
USA
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. ASD-STAN shall not be held responsible for identifying
any or all such patent
...
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