EN 3763:2010

Aerospace series - Nuts, hexagonal, self-locking, ball seat, in heat resisting steel, MoS2 lubricated - Classification: 900 MPa (at ambient temperature) / 315 °C

This standard specifies the characteristics of self-locking hexagonal nuts with ball seat in heat resisting steel, MoS2 lubricated.
Classification: 900 MPa / 315 °C.
They are intended to be used with washers to EN 3764 or suitable parts, see Annex A.

Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd, für Neigungsausgleich, aus hochwarmfestem Stahl, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur) / 315 °C

Diese Norm legt die Merkmale von selbstsichernden Sechskantmuttern zum Neigungsausgleich aus hochwarmfestem Stahl, MoS2-geschmiert, fest.
Klasse: 900 MPa  )/ 315 °C  )
Sie sind für die Verwendung zusammen mit Scheiben nach EN 3764 oder geeigneten Teilen ausgelegt, siehe Anhang A.

Série aérospatiale - Écrous hexagonaux, à freinage interne, orientables, en acier résistant à chaud, lubrifiés MoS2 - Classification: 900 MPa (à température ambiante) / 315 °C

Aeronavtika - Matice, šestrobe, samozapiralne, z izravnavo nagiba, iz toplotnoodpornega jekla, mazane z MoS2 - Klasifikacija: 900 MPa (pri temperaturi okolice)/315 °C

Ta standard določa značilnosti samozapiralnih šestrobih matic z izravnavo nagiba iz toplotnoodpornega jekla in mazanih z MoS2. Klasifikacija: 900 MPa /315 °C. Namenjene so za uporabo z tesnili EN 3764 ali ustreznimi deli, glej Dodatek A.

General Information

• Status: Published
• Publication Date: 26-Jan-2010
• Withdrawal Date: 30-Jul-2010
• ICS: 49.030.30 - Nuts
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3 - Mechanical
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 27-Jan-2010
• Completion Date: 27-Jan-2010
• Ref Project: SIST EN 3763:2010 - Aerospace series - Nuts, hexagonal, self-locking, ball seat, in heat resisting steel, MoS2 lubricated - Classification: 900 MPa (at ambient temperature)/315 °C

Overview

EN 3763:2010 specifies requirements for aerospace-series hexagonal, self-locking nuts with a ball seat, manufactured in heat-resisting steel and lubricated with MoS2 (molybdenum disulphide). The standard is aimed at high-temperature aerospace applications and gives a classification: 900 MPa (ambient) / 315 °C. It covers configuration, dimensions, tolerances, materials, surface treatment and marking, and references assembly with compatible washers (see EN 3764).

Keywords: EN 3763:2010, aerospace nuts, self-locking hexagonal nuts, ball seat, heat resisting steel, MoS2 lubricated, 900 MPa, 315 °C.

Key Topics

• Scope and classification
  • Defines self-locking hexagonal nuts with ball-seat geometry for temperature-classified use (900 MPa / 315 °C).
  • Notes clarify: 900 MPa is the minimum tensile stress at ambient when tested with a higher-strength bolt; 315 °C is the maximum exposure temperature before permanent alteration (surface treatment dependent).
• Geometry, dimensions and mass
  • Dimension tables and figure layouts (diameter codes such as 050–120 and associated MJ thread forms) specify sizes, masses and socket-fit requirements.
  • Forming out-of-round in the self-locking zone is permitted to achieve required self-locking torque.
• Tolerances and surface finish
  • Form and position tolerances referenced to ISO 8788.
  • Surface treatment and MoS2 dry-lubricant application referenced to EN 2491.
• Materials and qualification
  • Heat-resisting steel material guidance referenced to TR 3791.
  • Manufacturer approval and product qualification tied to aerospace quality systems (EN 9100, EN 9133).
• Designation and marking
  • Standardised designation format (e.g., NUT EN3763–060) and marking per EN 2424.
• Assembly
  • Informative Annex A provides washer and assembly dimensional guidance (links to EN 3764 washers).

Applications

• Used in aerospace, defense and high-temperature engine components where reliable locking at elevated temperatures is required.
• Typical users:
  • Aerospace fastener manufacturers and suppliers
  • Aircraft and engine design engineers specifying high-temperature, self-locking fasteners
  • Quality, procurement and certification teams who verify parts to aerospace standards
  • Maintenance and repair organizations needing compatible replacement nuts and washers

Related Standards

• EN 3764 - Washers, concave, in heat resisting steel (assembly partners)
• EN 2491 - MoS2 dry lubricants - coating methods
• ISO 5855-2, ISO 5858, ISO 8788 - thread limits, procurement and tolerance references
• EN 9100 / EN 9133 - manufacturer approval and product qualification
• TR 3791 - materials for self-locking nuts (temperature classes)

EN 3763:2010 ensures consistent performance and interchangeability of MoS2-lubricated, ball-seat self-locking nuts for aerospace applications where temperature resistance and secure locking are critical.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2010
Aeronavtika - Matice, šestrobe, samozapiralne, z izravnavo nagiba, iz
toplotnoodpornega jekla, mazane z MoS2 - Klasifikacija: 900 MPa (pri temperaturi
okolice)/315 °C
Aerospace series - Nuts, hexagonal, self-locking, ball seat, in heat resisting steel, MoS2
lubricated - Classification: 900 MPa (at ambient temperature)/315 °C
Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd, für Neigungsausgleich, aus
hochwarmfestem Stahl, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur)/315
°C
Série aérospatiale - Écrous hexagonaux, à freinage interne, orientables, en acier
résistant à chaud, lubrifiés MoS2 - Classification: 900 MPa (à température ambiante)/315
°C
Ta slovenski standard je istoveten z: EN 3763:2010
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3763
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2010
ICS 49.030.30
English Version
Aerospace series - Nuts, hexagonal, self-locking, ball seat, in
heat resisting steel, MoS lubricated - Classification: 900 MPa
(at ambient temperature) / 315 °C
Série aérospatiale - Écrous hexagonaux, à freinage interne, Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd,
orientables, en acier résistant à chaud, lubrifiés MoS2 - für Neigungsausgleich, aus hochwarmfestem Stahl, MoS2-
Classification: 900 MPa (à température ambiante) / 315 °C geschmiert - Klasse: 900 MPa (bei Raumtemperatur) / 315
°C
This European Standard was approved by CEN on 4 December 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
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CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
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EUROPEAN COMMITTEE FOR STANDARDIZATION
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EUROPÄISCHES KOMITEE FÜR NORMUNG

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© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3763:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Required characteristics .5
4 Designation .7
5 Marking .7
6 Technical specification .7
Annex A (informative) Assembly .8

Foreword
This document (EN 3763:2010) 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 July 2010, and conflicting national standards shall be withdrawn at the
latest by July 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,
...