kSIST FprEN 4162:2026

Aerospace series - Screw, 100° countersunk normal head, offset cruciform 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 bolts, 100° countersunk normal head, offset cruciform recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated.
Classification: 1 100 MPa /235 °C .

Luft- und Raumfahrt - 100°-Senkschraube mit Flügelkreuzschlitz, mittlere Gewindelänge, aus legiertem Stahl, verkadmet - Klasse: 1 100 MPa (bei Raumtemperatur)/235 °C

Dieses Dokument legt die Eigenschaften von 100°-Senkschrauben mit Flügelkreuzschlitz und mittlerer Gewin
delänge, aus legiertem Stahl, verkadmet, fest.
Klasse: 1100MPa 1/235°C2

Série aérospatiale - Vis à tête fraisée 100° normale, à empreinte cruciforme déportée, tige normale à tolérance large, filetage moyen, en acier allié, cadmiée - Classification : 1 100 MPa (à température ambiante)/235 °C

Le présent document spécifie les caractéristiques des vis à tête fraisée 100° normale, à empreinte cruciforme déportée, tige normale à tolérance large, filetage moyen, en acier allié, cadmiées.
Classification : 1 100 MPa /235 °C.

Aeronavtika - Vijak, 100° ugrezna glava, križna zareza, polno steblo, ozka toleranca, srednja navojna dolžina, iz legiranega jekla, prevlečeni s kadmijem - Klasifikacija: 1100 MPa (pri temperaturi okolice)/235 °C

General Information

• Status: Not Published
• Public Enquiry End Date: 26-Nov-2024
• ICS: 49.025.10 - Steels
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 18-May-2026
• Due Date: 06-Jul-2026
• Completion Date: 19-May-2026
• Ref Project: FprEN 4162 - Aerospace series - Screw, 100° countersunk normal head, offset cruciform recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa (at ambient temperature)/235 °C

Relations

• Revises: SIST EN 4162:2016 - Aerospace series - Screws 100° countersunk normal head, offset cruciform recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa (at ambient temperature) / 235 °C
• Effective Date: 05-Jun-2024
• Revises: SIST EN 4162:2016/AC:2017 - Aerospace series - Screws 100° countersunk normal head, offset cruciform recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa (at ambient temperature) / 235 °C
• Effective Date: 05-Jun-2024

Overview

kSIST FprEN 4162:2026 is a draft European standard from SIST specifying the characteristics of aerospace screws featuring a 100° countersunk normal head, offset cruciform recess, coarse tolerance normal shank, and medium length thread. These screws are manufactured from alloy steel and are cadmium plated for enhanced corrosion resistance. The standard classifies these screws for applications requiring a minimum tensile strength of 1 100 MPa at ambient temperature, and temperature stability up to 235 °C.

This document supersedes EN 4162:2016 and introduces important technical updates, including terms and definitions, revised surface treatment requirements, and updated drive code references.

Key Topics

• Screw Characteristics:

  • 100° countersunk normal head for flush mounting
  • Offset cruciform recess drive for improved torque transmission
  • Coarse tolerance normal shank and medium length thread for typical aerospace fittings
  • Material: Alloy steel classified for 1 100 MPa tensile strength
  • Surface treatment: Cadmium plating, various post-treatments available per EN 2133 and ISO 4520

• Dimension and Tolerance:

  • Dimensions conform to ISO 5856, ensuring compatibility with aerospace assemblies
  • Tolerances of form and position set by ISO 7913

• Surface Treatment Options:

  • Cadmium plating thickness per EN 2133 (8 µm to 14 µm on contact surfaces)
  • Post-treatment types include chromate conversion (Type 2), no cadmium passivation (Type 1), black chromate coating, and non-chromium (VI) passivations

• Marking and Identification:

  • Marking requirements in accordance with EN 2424
  • Designation covers hole code, diameter, length, drive code, and post-treatment code

• Technical and Quality Requirements:

  • Manufacturers must comply with recognized aerospace quality management systems (e.g., EN 9100)
  • Qualification of screws follows a documented process (e.g., EN 9133)

Applications

• Aerospace Structures:
  EN 4162 screws are designed for aircraft and spacecraft applications requiring high-strength fasteners capable of withstanding significant mechanical load and elevated temperatures.

• Flush Surface Assembly:
  The 100° countersunk head allows for components to be joined with minimal protrusion, enhancing aerodynamic performance and reducing drag on airframes.

• Critical Bolted Joints:
  The combination of alloy steel material and cadmium plating ensures longevity and reliability in harsh aerospace environments, including exposure to moisture and varying temperatures.

• Maintenance and Repairs:
  The standardized dimensions and recess types facilitate quick identification and replacement during routine or unscheduled maintenance, supporting ongoing airworthiness.

Related Standards

• EN 2133: Cadmium plating of steels with specified tensile strength ≤ 1 450 MPa
• EN 2424: Marking of aerospace products
• EN 3514: Hardened and tempered steel for bolts
• ISO 3353-1: Lead and runout threads-rolled external threads
• ISO 4520: Chromate conversion coatings on cadmium coatings
• ISO 5855-2: MJ thread limits for bolts and nuts
• ISO 5856: Screws, 100° normal countersunk head, offset cruciform drive
• ISO 7689: Aerospace bolts, procurement specification
• ISO 7913: Tolerances of form and position
• ISO 14275 / ISO 14276: Offset cruciform drive series
• EN 9100: Quality management for aerospace
• EN 9133: Qualification procedure for aerospace standard products

By adhering to kSIST FprEN 4162:2026, aerospace manufacturers, MRO providers, and suppliers ensure that fasteners meet stringent performance, durability, and traceability requirements necessary for safe and efficient operation in aerospace environments.

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 4162:2024
01-november-2024
Aeronavtika - Vijak, 100° ugrezna glava, križna zareza, polno steblo, ozka
toleranca, srednja navojna dolžina, iz legiranega jekla, prevlečeni s kadmijem -
Klasifikacija: 1100 MPa (pri temperaturi okolice)/235 °C
Aerospace series - Screw, 100° countersunk normal head, offset cruciform 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 - 100°-Senkschraube mit Flügelkreuzschlitz, mittlere Gewindelänge,
aus legiertem Stahl, verkadmet - Klasse: 1 100 MPa (bei Raumtemperatur)/235 °C
Série aérospatiale - Vis à tête fraisée 100° normale, à empreinte cruciforme déportée,
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: prEN 4162
ICS:
49.025.10 Jekla Steels
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
oSIST prEN 4162:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 4162:2024
oSIST prEN 4162:2024
DRAFT
EUROPEAN STANDARD
prEN 4162
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2024
ICS 49.030.20 Will supersede EN 4162:2016
English Version
Aerospace series - Screw, 100° countersunk normal head,
offset cruciform 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 fraisée 100° normale, à Luft- und Raumfahrt - 100°-Senkschraube mit
empreinte cruciforme déportée, tige normale à Flügelkreuzschlitz, mittlere Gewindelänge, aus
tolérance large, filetage moyen, en acier allié, cadmiées legiertem Stahl, verkadmet - Klasse: 1 100 MPa (bei
- Classification: 1 100 MPa (à température Raumtemperatur)/235 °C
ambiante)/235 °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 NORMALISATIO N

E UROPÄISCHES KOMITEE FÜR NORMUN G

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4162:2024 E
worldwide for CEN national Members.

oSIST prEN 4162:2024
prEN 4162:2024 (E)
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 — Masses . 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 screws . 10
Bibliography . 11

oSIST prEN 4162:2024
prEN 4162:2024 (E)
European foreword
This document (prEN 4162:2024) 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, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 4162:2016.
This document includes the following significant technical changes with respect to EN 4162:2016:
— Clause 3 „Terms and definitions“ added;
— update of 4.3 „Surface treatment“;
— Table 3 has been updated with new drive code references.
oSIST prEN 4162:2024
prEN 4162:2024 (E)
1 Scope
This document specifies the characteristics of bolts, 100° countersunk normal head, offset cruciform
recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated.
1 2
Classification: 1 100 MPa /235 °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 referenced document (including any amendments) applies.
EN 2133:2020, Aerospace series — Cadmium plating of steels with specified
...