prEN 4072
(Main)Aerospace series - Screw, 100° countersunk normal head, offset cruciform recess, close tolerance shank, short thread in titanium alloy, aluminium IVD coated - Classification: 1 100 MPa (at ambient temperature)/425 °C
- Abstract
This document specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, close tolerance shank, short thread, in titanium alloy, aluminium IVD coated.
Classification: 1 100 MPa /425 °C .
- Status
- Not Published
- Publication Date
- 13-Dec-2027
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3/S 2 - Fasteners
- Current Stage
- 4020 - Submission to enquiry - Enquiry
- Start Date
- 23-Jul-2026
- Completion Date
- 23-Jul-2026
prEN 4072 is a draft European Standard from CEN for aerospace screws with a 100° countersunk normal head, offset cruciform recess, close tolerance shank, short thread, titanium alloy and aluminium IVD coating. It specifies the product characteristics, classification as 1 100 MPa at ambient temperature/425 °C, and the rules for designation, marking, technical specification and oversized bolts. Engineers, buyers and quality teams use it to select, make, inspect and qualify this fastener type for aerospace applications.
What does prEN 4072 specify?
prEN 4072 specifies the characteristics of one screw type for the aerospace series: a 100° countersunk normal head screw with offset cruciform recess, close tolerance shank, short thread, titanium alloy and aluminium IVD coating. The document also fixes the strength and temperature classification, so users know the mechanical class and service temperature basis they are buying or controlling.
The document is organized into clauses 1 to 8:
- scope
- normative references
- terms and definitions
- required characteristics
- designation
- marking
- technical specification
- oversized bolts
A bibliography follows the main text. Clause 4 carries the core product definition, while clauses 5 to 8 cover identification, marking, qualification and oversized parts.
What are the key requirements of prEN 4072?
Clause 4.1 ties the screw configuration, dimensions and mass to Figure 1 and Table 1. Dimensions are in millimetres and apply after surface treatment, which matters because inspection must be done on the finished part, not the bare blank.
Clause 4.2 requires tolerances of form and position in accordance with ISO 7913. In practice, this controls geometry that affects fit, alignment and assembly reliability.
Clause 4.3 requires materials in accordance with TR 3775: titanium alloy, strength class 1 100 MPa. This tells the supplier and buyer which material family and load class the screw belongs to.
Clause 4.4 sets the surface treatment options: EN 6118 type I or type II, or MIL-DTL-83488 type II class 3, with aluminium deposit thickness between 4 µm and 12 µm. Optional lubrication with cetyl alcohol, code E, is allowed after aluminium deposit, which affects friction and the ordering code.
Clause 5 defines the designation structure using a hole code, diameter code, length code, drive code and lubrication code. This is the ordering language for procurement and drawing callouts.
Clause 6 gives the marking rules and links them to EN 2424 style marking. For users, this means the part must be identifiable in a way that matches the approved diameter range and product form.
Clause 7.1 makes the technical specification follow ISO 9152, but changes the recess removal torque test by giving specific torque values in Table 5. That matters for qualification and acceptance testing of the drive recess.
Clause 7.2 and 7.3 require an approved aerospace production organization with a quality management system such as EN 9100, and qualification according to EN 9133 or an equivalent aerospace procedure. This is what links the screw standard to controlled production and documented qualification.
Clause 8 sends oversized bolts to EN 4016. If an oversized version is needed, it is controlled by that separate aerospace standard.
Who uses prEN 4072?
prEN 4072 is used by aerospace fastener manufacturers, distributors, procurement teams, design engineers, quality managers and test laboratories. Manufacturers use it for product design and surface treatment control. Buyers and engineers use it to specify the screw unambiguously, while quality and qualification teams use it for inspection, torque testing, marking checks and approval of production.
What changed in prEN 4072 from the previous edition?
prEN 4072 will supersede EN 4072:2016 + AC:2017. Compared with that edition, it adds Clause 3, revises Clause 7 editorially, and deletes Annex A, the “Standard evolution form”.
Which standards are used with prEN 4072?
| Standard | How it is used with prEN 4072 |
|---|---|
| EN 2424 | Marking of aerospace products |
| EN 4016 | Oversized bolts |
| EN 6118 | Pure aluminium IVD coating for fasteners |
| EN 6117 | Cetyl alcohol lubrication code E |
| EN 9100 | Example of an acceptable aerospace quality management system |
| EN 9133 | Example of an aerospace qualification procedure |
| ISO 3353-1 | Lead and runout threads for rolled external threads |
| ISO 5855-2 | MJ thread limit dimensions for bolts and nuts |
| ISO 5856 | Dimensions for 100° normal countersunk head screws |
| ISO 7913 | Tolerances of form and position |
| ISO 9152 | Procurement specification framework for titanium alloy MJ-thread bolts |
| ISO 14275 | Internal offset cruciform ribbed drive |
| ISO 14276 | Internal offset cruciform drive |
| TR 3775 | Materials for bolts and pins |
| MIL-DTL-83488 | Alternative aluminium coating specification |
What does the prEN 4072 document contain?
Figure 1 shows the screw configuration, including the optional hole and the drive arrangement. Table 1 gives the dimensional series and approximate mass values, together with notes on length increments and thread relations. Tables 2 and 3 define the hole, drive and lubrication codes used in the designation. Table 4 sets the marking scheme, and Table 5 gives the recess removal torque values used in the technical specification. The designation example shows how to build a full ordering reference for procurement and documentation.
Relations
- Effective Date
- 11-Mar-2026
- Effective Date
- 11-Mar-2026
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Frequently Asked Questions
prEN 4072 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, close tolerance shank, short thread in titanium alloy, aluminium IVD coated - Classification: 1 100 MPa (at ambient temperature)/425 °C". This standard covers: This document specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, close tolerance shank, short thread, in titanium alloy, aluminium IVD coated. Classification: 1 100 MPa /425 °C .
This document specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, close tolerance shank, short thread, in titanium alloy, aluminium IVD coated. Classification: 1 100 MPa /425 °C .
prEN 4072 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.
prEN 4072 has the following relationships with other standards: It is inter standard links to EN 4072:2016, EN 4072:2016/AC:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
prEN 4072 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-oktober-2026
Aeronavtika - Vijaki, 100° ugreznjena glava, križna zareza, polno steblo, ozka
toleranca, kratek navoj, iz titanove zlitine, prevlečene z aluminijem IVD -
Klasifikacija: 1100 MPa (pri temperaturi okolice)/425 °C
Aerospace series - Screw, 100° countersunk normal head, offset cruciform recess, close
tolerance shank, short thread in titanium alloy, aluminium IVD coated - Classification: 1
100 MPa (at ambient temperature)/425 °C
Luft- und Raumfahrt - 100° Senkschraube mit Flügelkreuzschlitz, kurzes Gewinde, aus
Titanlegierung, Aluminium IVD beschichtet - Klasse: 1 100 MPa (bei
Raumtemperatur)/425 °C
Série aérospatiale - Vis à tête fraisée 100° normale, à empreinte cruciforme déportée, fût
à tolérance serrée, filetage court, en alliage de titane, revêtues aluminium IVD -
Classification : 1 100 MPa (à température ambiente)/425 °C
Ta slovenski standard je istoveten z: prEN 4072
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
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2026
ICS 49.030.20 Will supersede EN 4072:2016
English Version
Aerospace series - Screw, 100° countersunk normal head,
offset cruciform recess, close tolerance shank, short thread
in titanium alloy, aluminium IVD coated - Classification: 1
100 MPa (at ambient temperature)/425 °C
Série aérospatiale - Vis à tête fraisée 100° normale, à Luft- und Raumfahrt - 100° Senkschraube mit
empreinte cruciforme déportée, fût à tolérance serrée, Flügelkreuzschlitz, kurzes Gewinde, aus
filetage court, en alliage de titane, revêtues aluminium Titanlegierung, Aluminium IVD beschichtet - Klasse: 1
IVD - Classification : 1 100 MPa (à température 100 MPa (bei Raumtemperatur)/425 °C
ambiente)/425 °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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4072:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Required characteristics . 5
4.1 Configuration – Dimensions – Mass. 5
4.2 Tolerances of form and position . 5
4.3 Materials . 5
4.4 Surface treatment . 5
5 Designation . 9
6 Marking . 9
7 Technical specification . 9
7.1 General. 9
7.2 Approval of manufacturers . 10
7.3 Qualification of bolts. 10
8 Oversized bolts . 10
Bibliography . 11
European foreword
This document (prEN 4072:2026) 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 document is currently submitted to the CEN Enquiry.
This document will supersede EN 4072:2016 + AC:2017.
EN 4072:2016 + AC:2017:
— Clause 3, “Terms and definitions”, added;
— Clause 7, “Technical specification”, editorially revised;
— Annex A, “Standard evolution form”, deleted.
1 Scope
This document specifies the characteristics of screws, 100° countersunk normal head, offset cruciform
recess, close tolerance shank, short thread, in titanium alloy, aluminium IVD coated.
1 2
Classification: 1 100 MPa /425 °C .
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenc
...