SIST EN 4848:2022

Aerospace series - Screw, pan head, Spiral Drive Recess, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature)/315 °C

This document specifies the characteristics of externally threaded fasteners, pan head, Spiral Drive Recess, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated, for aerospace applications.
Classification: 1 100 MPa /315 °C .

Luft- und Raumfahrt - Flachkopfschraube mit Spiral Antrieb, grobe Schafttoleranz, mittlere Gewindelänge, aus Titanlegierung, anodisiert, MoS2 geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur)/315 °C

Dieses Dokument legt die Eigenschaften von Verbindungselementen mit Außengewinde, Flachkopfschraube, Spiral-Antrieb, grobe Schafttoleranz, mittellanges Gewinde, aus Titanlegierung, anodisiert, MoS2-geschmiert, für Luft- und Raumfahrtanwendungen fest.
Klasse: 1 100 MPa /315 °C .

Série aérospatiale - Vis à tête cylindrique, empreinte en spirale, tige normale à tolérance large, filetage moyen, en alliage de titane, anodisée, lubrifiée au MoS2 - Classification : 1 100 MPa (à température ambiante)/315 °C

Le présent document spécifie les caractéristiques des éléments de fixation à filetage extérieur, à tête cylindrique, empreinte en spirale, tige normale à tolérance large, filetage moyen, en alliage de titane, anodisés, lubrifiés au MoS2, pour les applications aérospatiales.
Classification : 1 100 MPa/315 °C.

Aeronavtika - Vijak, valjasta glava, spiralna vdolbina, široka toleranca, srednja navojna dolžina, iz titanove zlitine, anodiziran, mazan z MoS2 - Klasifikacija: 1100 MPa (pri temperaturi okolice)/315 °C

Ta dokument določa značilnosti zunanjih navojnih veznih elementov – valjasta glava, spiralna vdolbina, široka toleranca, srednja navojna dolžina, iz titanove zlitine, anodiziranih, mazanih z MoS2 – za uporabo v aeronavtiki.
Klasifikacija: 1100 MPa/315 °C.

General Information

• Status: Published
• Publication Date: 05-Apr-2022
• ICS: 49.025.30 - Titanium
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 30-Mar-2022
• Due Date: 04-Jun-2022
• Completion Date: 06-Apr-2022
• Ref Project: EN 4848:2022 - Aerospace series - Screw, pan head, Spiral Drive Recess, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature)/315 °C

Overview

EN 4848:2022 is a CEN aerospace standard that specifies the characteristics of externally threaded pan-head screws with a Spiral Drive Recess, manufactured in titanium alloy, anodized and lubricated with molybdenum disulphide (MoS2). The standard targets aerospace applications requiring high-strength fasteners, classified at 1 100 MPa (ambient) and usable up to 315 °C.

Key elements defined in the standard include configuration, dimensions, tolerances, materials, surface treatment and lubrication, designation and marking, and procurement/qualification requirements.

Key Topics

• Geometry & tolerances: Dimensions and dimensional tolerances are specified (millimetres, after surface treatment). Tolerances of form and position reference ISO 7913.
• Surface finish: Roughness requirements are defined: bearing surfaces (underhead face, fillet radius, shank, thread) Ramax = 0.8 µm; all other surfaces Ramax = 3.2 µm. Sharp edges to be broken by 0.1 to 0.4 mm.
• Materials: Materials are specified in accordance with EN 3813 (e.g., titanium alloy TI-P64001 / Ti‑6Al‑4V for forged fasteners).
• Surface treatment: Anodizing per EN 2808 is required.
• Lubrication: MoS2 dry film lubrication according to EN 3021, applied per EN 2491 at 5 µm to 10 µm (code F).
• Drive & patent note: The Spiral Drive Recess geometry references EN 4609. The standard notes a claimed patent (Spiral Drive System for Threaded Fasteners) and identifies MORTORQ® as a trade name used by licensees of the patent holder.
• Marking & designation: Marking follows EN 2424 and drive coding per EN 4609. Procurement specification and qualification reference ISO 9152 and EN 4609.

Applications

This standard is intended for aerospace and defence use where lightweight, high-strength fasteners are required with controlled surface treatment and lubrication. Typical applications and benefits include:

• Weight-sensitive airframe structures using titanium alloy fasteners
• High-temperature service up to 315 °C without permanent degradation
• Improved torque and installation consistency using Spiral Drive Recess designs
• Corrosion protection and friction control via anodizing and MoS2 dry-film lubrication

Manufacturers and procuring authorities will find the standard useful for specifying compatible fasteners, ensuring interchangeability, quality assurance and conformity to aerospace procurement norms.

Related Standards

• EN 3813 (titanium alloy material specification)
• EN 2808 (anodizing of titanium)
• EN 3021 / EN 2491 (MoS2 dry film lubricants and application)
• EN 4609 (Spiral drive recess geometry and requirements)
• ISO 9152, ISO 3353-1, ISO 5855-2, ISO 7913 (thread, tolerances and procurement)
• EN 2424 (marking of aerospace products)

For procurement, qualification and manufacturer approval the standard points to ISO 9152 and aerospace quality systems (e.g., EN 9100) as referenced in the technical specification.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2022
Aeronavtika - Vijak, valjasta glava, spiralna vdolbina, široka toleranca, srednja
navojna dolžina, iz titanove zlitine, anodiziran, mazan z MoS2 - Klasifikacija: 1100
MPa (pri temperaturi okolice)/315 °C
Aerospace series - Screw, pan head, Spiral Drive Recess, coarse tolerance normal
shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated -
Classification: 1 100 MPa (at ambient temperature)/315 °C
Luft- und Raumfahrt - Flachkopfschraube mit Spiral Antrieb, grobe Schafttoleranz,
mittlere Gewindelänge, aus Titanlegierung, anodisiert, MoS2 geschmiert - Klasse: 1 100
MPa (bei Raumtemperatur)/315 °C
Série aérospatiale - Vis à tête cylindrique, empreinte en spirale, tige normale à tolérance
large, filetage moyen, en alliage de titane, anodisée, lubrifiée au MoS2 - Classification : 1
100 MPa (à température ambiante)/315 °C
Ta slovenski standard je istoveten z: EN 4848:2022
ICS:
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.

EN 4848
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
titanium alloy, anodized, MoS2 lubricated - Classification:
1 100 MPa (at ambient temperature)/315 °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 alliage de titane, anodisée, lubrifiée au MoS2 - aus Titanlegierung, anodisiert, MoS2 geschmiert -
Classification : 1 100 MPa (à température Klasse: 1 100 MPa (bei Raumtemperatur)/315 °C
ambiante)/315 °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 4848:2022 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 . 9
4.3 Materials . 9
4.4 Surface treatment . 9
4.5 Lubrication . 9
5 Designation . 9
6 Marking . 9
7 Technical specification . 10
Bibliography. 11

European foreword
This document (EN 4848:2022) 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 hold
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