EN 4135:2009
(Main)Aerospace series - Bolts, normal bi-hexagonal head, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C
Aerospace series - Bolts, normal bi-hexagonal head, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C
This standard specifies the characteristics of bolts, normal bi-hexagonal head, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubrificated.
Classification: 1 100 MPa ) / 315 °C )
Luft- und Raumfahrt - Zwölfkantschrauben, mittlere Gewindelänge, aus Titanlegierung, anodisiert, MoS2-geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °C
Diese Norm legt die Eigenschaften für Zwölfkantschrauben, mittleres Gewinde, aus Titanlegierung, anodisiert,
MoS2-geschmiert, fest.
Klasse: 1 100 MPa1)/315 °C2)
Série aérospatiale - Vis à tête bihexagonale normale, tige normale à tolérance large, filetage moyen, en alliage de titane, anodisées, lubrifiées MoS2 - Classification : 1 100 MPa (à température ambiante) / 315 °C
Aeronavtika - Sorniki, normalna dvanajstroba glava, široka toleranca, srednja navojna dolžina, iz titanove zlitine, anodizirani, namazani z MoS2 - Klasifikacija: 1100 MPa (pri temperaturi okolice)/315 °C
General Information
- Status
- Published
- Publication Date
- 30-Jun-2009
- Withdrawal Date
- 30-Jan-2010
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 21-Jan-2025
- Completion Date
- 11-Feb-2026
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 4135:2009 is a European standard that specifies aerospace-grade bolts with a normal bi-hexagonal head, coarse tolerance normal shank, and medium length thread. These bolts are made from titanium alloy, anodized for enhanced corrosion resistance, and lubricated with molybdenum disulphide (MoS2) to improve performance in demanding aerospace applications. The classification specifies a minimum tensile strength of 1100 MPa at ambient temperature and operational capability up to 315 °C.
Developed and maintained by the European Committee for Standardization (CEN), this standard ensures consistent quality, dimensions, and performance across aerospace fasteners, supporting reliable design and manufacturing in the aerospace and defense industries.
Key Topics
Bolt Specifications:
- Bi-hexagonal head design for robust wrenching and torque control
- Coarse tolerance on shank diameter ensuring fit standardization
- Medium thread length optimized for aerospace assembly needs
Material Characteristics:
- Titanium alloy construction offering high strength-to-weight ratio
- Anodized surface treatment enhancing corrosion resistance and wear properties
- MoS2 dry lubrication coating for reduced friction and improved longevity
Mechanical Performance:
- Classified for a tensile strength of 1100 MPa at room temperature
- Thermal resistance rated up to 315 °C without material degradation
Dimensional and Quality Standards:
- Compliance with related ISO standards such as ISO 3185 (dimensions) and ISO 7913 (tolerances)
- Marking and traceability according to EN 2424 to ensure product authenticity and batch verification
- Manufacturer approval and product qualification governed by aerospace quality management standards EN 9100 and EN 9133
Applications
EN 4135:2009 bolts are engineered to meet the rigorous demands of aerospace and defense industries where reliable fasteners are critical. Typical practical applications include:
- Aircraft Structural Assemblies: Providing secure joining of fuselage, wings, and engine mounts where high strength and temperature resistance are essential.
- Spacecraft Components: Suitable for assemblies exposed to wide temperature ranges and requiring corrosion resistance in harsh environments.
- Aerospace Engine Fastening: Optimized for components requiring precision torque and lubrication under high-stress and high-temperature conditions.
- Defense Equipment: Used in military aerospace platforms where durability and reliability under extreme environmental factors are mandatory.
The use of titanium alloy bolts provides weight savings improving fuel efficiency and payload capacity, while anodizing and MoS2 lubrication optimize service life and reduce maintenance intervals.
Related Standards
- EN 2424: Marking of aerospace products to ensure proper identification and traceability.
- EN 2491: Coating methods for molybdenum disulphide dry lubricants, specifying application thickness and quality.
- EN 9100: Quality management systems for aerospace industry manufacturers, based on ISO 9001 standards.
- EN 9133: Qualification procedures for aerospace standard parts, including bolt performance testing and certification.
- ISO 3185: Dimensional standards for aerospace bolts with bi-hexagonal heads.
- ISO 7913: Defines tolerances of form and position critical for bolt fit and function.
- ISO 9152: Technical procurement specification for titanium alloy bolts classified at 1100 MPa strength.
- TR 3775: Defines titanium alloy materials used in aerospace bolts.
- TR 4070: Lists approved commercial molybdenum disulphide coatings suitable for aerospace fasteners.
Summary
EN 4135:2009 defines a high-strength, corrosion-resistant, and thermally stable bolt design with precise dimensional and performance requirements for use in aerospace and defense sectors. Its emphasis on titanium alloy construction, anodized finish, and MoS2 lubrication positions it as a critical standard for manufacturers and engineers specifying fasteners where reliability, durability, and compliance with aerospace quality norms are paramount. Adherence to this standard supports enhanced safety, efficiency, and durability in demanding aerospace assemblies.
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Frequently Asked Questions
EN 4135:2009 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Bolts, normal bi-hexagonal head, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C". This standard covers: This standard specifies the characteristics of bolts, normal bi-hexagonal head, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubrificated. Classification: 1 100 MPa ) / 315 °C )
This standard specifies the characteristics of bolts, normal bi-hexagonal head, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubrificated. Classification: 1 100 MPa ) / 315 °C )
EN 4135:2009 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.
EN 4135:2009 has the following relationships with other standards: It is inter standard links to EN 9100:2018, EN 840-6:2004+A1:2008, EN 2491:2011, EN 14460:2006, EN 14035-19:2003, EN 2424:2008, EN 9133:2018, EN ISO 17233:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 4135:2009 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-2009
Aeronavtika - Sorniki, normalna dvanajstroba glava, široka toleranca, srednja
navojna dolžina, iz titanove zlitine, anodizirani, namazani z MoS2 - Klasifikacija:
1100 MPa (pri temperaturi okolice)/315 °C
Aerospace series - Bolts, normal bi-hexagonal head, coarse tolerance normal shank,
medium length thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1100
MPa (at ambient temperature)/315 °C
Luft- und Raumfahrt - Zwölfkantschrauben, mittlere Gewindelänge, aus Titanlegierung,
anodisiert, MoS2-geschmiert - Klasse: 1100 MPa (bei Raumtemperatur)/315 °C
Série aérospatiale - Vis à tête bihexagonale normale, tige normale à tolérance large,
filetage moyen, en alliage de titane, anodisées, lubrifiées MoS2 - Classification: 1100
MPa (à température ambiante)/315 °C
Ta slovenski standard je istoveten z: EN 4135:2009
ICS:
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 4135
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2009
ICS 49.030.20
English Version
Aerospace series - Bolts, normal bi-hexagonal head, 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 bihexagonale normale, tige Luft- und Raumfahrt - Zwölfkantschrauben, mittlere
normale à tolérance large, filetage moyen, en alliage de Gewindelänge, aus Titanlegierung, anodisiert, MoS2-
titane, anodisées, lubrifiées MoS2 - Classification : 1 100 geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur) /
MPa (à température ambiante) / 315 °C 315 °C
This European Standard was approved by CEN on 6 June 2009.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4135:2009: E
worldwide for CEN national Members.
Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Required characteristics .4
4 Designation .7
5 Marking .7
6 Technical specification .7
Foreword
This document (EN 4135:2009) 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 January 2010, and conflicting national standards shall be withdrawn at
the latest by January 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] 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, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Ma
...
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