Aerospace series - Bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS2 coated - Classification: 1 100 MPa (at ambient temperature)/315 °C

This document specifies the characteristics of bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS2 dryfilm coated, for aerospace applications.
Classification: 1 100 MPa /315 °C .
These bolts are intended to be used with washers according to EN 2414 and nuts according to EN 3230.

Luft- und Raumfahrt - Sechskant-Passschrauben, kleiner Kopf, enge Schafttoleranz, kurzes Gewinde, aus Titanlegierung, anodisiert, MoS2‑geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur)/315 °C

Dieses Dokument legt die Eigenschaften von Sechskant-Passschrauben mit kleinem Kopf, enge Schafttoleranz, kurzes Gewinde, aus Titanlegierung, die anodisiert und mit einem MoS2 Trockenfilm beschichtet sind, für Anwendungen in der Luft- und Raumfahrt fest.
Klasse: 1 100 MPa /315 °C .
Diese Sechskant-Passschrauben sind für die Verwendung mit Scheiben nach EN 2414 und Muttern nach EN 3230 bestimmt.

Série aérospatiale - Vis épaulées, à tête hexagonale fine, tige à tolérance serrée, filetage court, en alliage de titane, anodisées, revêtues MoS2 - Classification : 1 100 MPa (à température ambiante)/315 °C

Le présent document spécifie les caractéristiques des vis épaulées, à tête hexagonale fine, tige à tolérance serrée, filetage court, en alliage de titane, anodisées, revêtues de film sec MoS2, pour les applications aérospatiales.
Classification : 1 100 MPa /315 °C.
Ces vis sont destinées à être utilisées avec des rondelles conformes à l’EN 2414 et des écrous conformes à l’EN 3230.

Aeronavtika - Sorniki, vezi, tanka šesterokotna glava, ozka toleranca, kratek navoj, iz titanove zlitine, anodizirani, mazani z MoS2 - Klasifikacija: 1 100 MPa (pri temperaturi okolice)/315 °C

General Information

Status
Not Published
Publication Date
03-Jan-2027
ICS
49.030.20 - Bolts, screws, studs
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 3/S 2 - Fasteners
Current Stage
4060 - Closure of enquiry - Enquiry
Start Date
25-Sep-2025
Completion Date
25-Sep-2025
Ref Project
oSIST prEN 3740:2025 - Aerospace series - Bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS2 coated - Classification: 1 100 MPa (at ambient temperature)/315 °C

Relations

Revises
EN 3740:2019 - Aerospace series - Bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS2 coated - Classification: 1 100 MPa (at ambient temperature)/315 °C
Effective Date
20-Nov-2024

Overview

prEN 3740:2025 - Aerospace series - specifies the characteristics of shouldered bolts with thin hexagonal heads, close-tolerance shanks and short threads made from titanium alloy, with anodized surface and MoS2 (molybdenum disulphide) dryfilm coating for aerospace use. The standard classifies these fasteners as 1 100 MPa / 315 °C (minimum tensile strength at ambient temperature / maximum service temperature without permanent change). Bolts are intended for use with washers per EN 2414 and nuts per EN 3230.

Key topics and requirements

  • Configuration, dimensions and masses: Detailed geometric definitions, figures and a dimension/mass table (diameter and length codes) are provided; values apply after anodizing and MoS2 coating.
  • Tolerances of form and position: Specified in accordance with ISO 7913.
  • Materials and strength class: Titanium alloy materials referenced via TR 3775, strength class 1 100 MPa.
  • Surface treatment: Coating selection per TR 4070 and application per EN 2491; bolt head may be coated or uncoated; surface roughness requirements apply prior to coating; edges to be broken 0.1–0.4 mm.
  • Designation and marking: Designation format (e.g., BOLT EN 3740-050 024 G) and marking requirements follow EN 2424, with MJ thread style identification.
  • Technical procurement and testing: Based on ISO 9152 with aerospace additions - manufacturers must be approved production organizations and maintain an aerospace quality system (e.g., EN 9100). Qualification of bolts follows aerospace qualification procedures (e.g., EN 9133). Mechanical testing is performed on travellers (finished parts with undrilled, massive shank).
  • Oversized bolts: Covered by EN 4016.

Applications and who uses this standard

  • Aerospace structural engineers specifying high-strength, lightweight fasteners for airframe assemblies where corrosion control and solid lubrication (MoS2) are required.
  • Fastener manufacturers producing titanium alloy bolts to aerospace tolerances, coatings and marking.
  • Procurement and quality managers ensuring supplier approval, product qualification and traceability per aerospace quality systems.
  • Maintenance and assembly technicians selecting compatible washers/nuts and understanding temperature and strength limits (1 100 MPa / 315 °C).

Related standards

  • EN 2414 (washers), EN 3230 (nuts)
  • EN 2491 (MoS2 coating application), TR 4070 (MoS2 product list)
  • TR 3775 (titanium materials), ISO 7913 (tolerances), ISO 9152 (procurement), EN 4016 (oversized bolts)
  • EN 9100 / EN 9133 (quality & qualification)

Keywords: prEN 3740, aerospace bolts, titanium alloy bolts, MoS2 coating, anodized bolts, close tolerance shank, short thread, 1 100 MPa, 315 °C.

Frequently Asked Questions

prEN 3740 is a draft published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS2 coated - Classification: 1 100 MPa (at ambient temperature)/315 °C". This standard covers: This document specifies the characteristics of bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS2 dryfilm coated, for aerospace applications. Classification: 1 100 MPa /315 °C . These bolts are intended to be used with washers according to EN 2414 and nuts according to EN 3230.

This document specifies the characteristics of bolts, shouldered, thin hexagonal head, close tolerance shank, short thread, in titanium alloy, anodized, MoS2 dryfilm coated, for aerospace applications. Classification: 1 100 MPa /315 °C . These bolts are intended to be used with washers according to EN 2414 and nuts according to EN 3230.

prEN 3740 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 3740 has the following relationships with other standards: It is inter standard links to EN 3740:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

prEN 3740 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-september-2025
Aeronavtika - Sorniki, vezi, tanka šesterokotna glava, ozka toleranca, kratek navoj,
iz titanove zlitine, anodizirani, mazani z MoS2 - Klasifikacija: 1 100 MPa (pri
temperaturi okolice)/315 °C
Aerospace series - Bolts, shouldered, thin hexagonal head, close tolerance shank, short
thread, in titanium alloy, anodized, MoS2 coated - Classification: 1 100 MPa (at ambient
temperature)/315 °C
Luft- und Raumfahrt - Sechskant-Passschrauben, kleiner Kopf, enge Schafttoleranz,
kurzes Gewinde, aus Titanlegierung, anodisiert, MoS2‑geschmiert - Klasse: 1 100 MPa
(bei Raumtemperatur)/315 °C
Série aérospatiale - Vis épaulées, à tête hexagonale fine, tige à tolérance serrée, filetage
court, en alliage de titane, anodisées, revêtues MoS2 - Classification : 1 100 MPa (à
température ambiante)/315 °C
Ta slovenski standard je istoveten z: prEN 3740
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2025
ICS 49.030.20 Will supersede EN 3740:2019
English Version
Aerospace series - Bolts, shouldered, thin hexagonal head,
close tolerance shank, short thread, in titanium alloy,
anodized, MoS2 coated - Classification: 1 100 MPa (at
ambient temperature)/315 °C
Luft- und Raumfahrt - Sechskant-Passschrauben,
kleiner Kopf, enge Schafttoleranz, kurzes Gewinde, aus
Titanlegierung, anodisiert, MoS2-geschmiert - Klasse: 1
100 MPa (bei Raumtemperatur)/315 °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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 3740:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 4
4.1 Configuration — Dimensions — Masses . 4
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
8 Oversized bolts . 9
Bibliography. 10

European foreword
This document (prEN 3740:2025) 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 3740:2019.
This document includes the following significant technical changes with respect to EN 3740:2019:
— 4.4 “Surface treatment” updated;
— document editorially revised.
1 Scope
This document specifies the characteristics of bolts, shouldered, thin hexagonal head, close tolerance
shank, short thread, in titanium alloy, anodized, MoS dryfilm coated, for aerospace applications.
1 2
Classification: 1 100 MPa /315 °C .
These bolts are intended to be used with washers according to EN 2414 and nuts according to EN 3230.
2 Normative references
T
...

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