prEN 2883

• Abstract:

  This document specifies the characteristics of self-locking hexagonal nuts, with counterbore and captive washer, in heat resisting steel, MoS2 lubricated.; Classification: 1 100 MPa1/315 °C2.

• Status: Not Published
• Publication Date: 19-Oct-2027
• ICS: 49.030.20 - Bolts, screws, studs
• ICS: 49.030.30 - Nuts
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3/S 2 - Fasteners
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 16-Jul-2026
• Completion Date: 16-Jul-2026
• Ref Project: oSIST prEN 2883:2026 - Aerospace series - Nuts, hexagonal, self-locking, with counterbore and captive washer, in heat resisting steel, MoS2 lubricated - Classification : 1 100 MPa (at ambient temperature) / 315 °C

• Revises: EN 2883:2009 - Aerospace series - Nuts, hexagonal, self-locking, with counterbore and captive washer, in heat resisting steel, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C
• Effective Date: 20-Jan-2026

Overview

prEN 2883 is a draft European Standard developed by CEN for the aerospace sector. It specifies the technical characteristics of self-locking hexagonal nuts featuring a counterbore and captive washer. These nuts are manufactured from heat resisting steel and lubricated with molybdenum disulphide (MoS2), offering reliability and high performance under demanding conditions. Classified at 1 100 MPa tensile strength at ambient temperature and capable of withstanding up to 315 °C, prEN 2883 ensures the durability and safety of fasteners in critical aerospace applications.

Key Topics

• Product Design: Defines hexagonal, self-locking nuts with integrated counterbore and captive washer.
• Material Requirements: Specifies use of heat resisting steels compliant with EN 2399, EN 3638, EN 3639, TR 3791, or SAE AMS5525 for nuts and washers.
• Surface Treatment: Requires MoS2 lubrication for enhanced performance and corrosion resistance; washers undergo passivation in accordance with EN 2516.
• Dimensional Standards: Dimensions, tolerances, and mass values are established according to ISO 8538, ISO 5855-2, and ISO 8788 to ensure interchangeability and consistency.
• Marking and Traceability: Mandates product marking as per EN 2424, ensuring identification and traceability throughout the supply chain.
• Quality Assurance: Manufacturers must demonstrate compliance through an approved quality management system, such as EN 9100, and validated qualification procedures under EN 9133.

Applications

prEN 2883 applies broadly within the aerospace industry where fastener reliability under stress and high temperatures is essential. Key application areas include:

• Aircraft Structures: Used in primary and secondary structures where vibration, high tensile loads, and temperature fluctuations are significant.
• Aerospace Assemblies: Critical for engine components, landing gear, and systems subject to dynamic mechanical and thermal stresses.
• Space Systems: Suitable for satellite or launch vehicle components due to the combination of mechanical strength and resistance to environmental extremes.
• Maintenance and Repairs: Provides standardized replacement parts, supporting consistent maintenance practices and supply chain efficiency.

These self-locking nuts are designed to maintain preload and prevent loosening under vibration, reducing the risk of service failures and ensuring the safety and longevity of aerospace equipment.

Related Standards

The scope and requirements of prEN 2883 are supported by several international and European standards, including:

• EN 2399: Aerospace series - Heat resisting steel specifications for bars for forged bolts.
• EN 2424: Marking standards for aerospace products, ensuring traceability.
• EN 2491: Dry MoS2 lubricants and coating methods.
• EN 2516: Passivation of corrosion resisting steels.
• EN 3638/EN 3639: Materials standards for heat-resisting alloy products.
• ISO 5855-2: Defines limit dimensions for MJ threads on bolts and nuts.
• ISO 5858: Procurement specifications for aerospace self-locking nuts.
• ISO 8538: Detailed standard for hexagonal self-locking nuts with counterbore and captive washer.
• ISO 8788: Standard for tolerances of form and position on metric nuts.
• EN 9100: Aerospace quality management systems requirement.
• EN 9133: Qualification procedures for aerospace standard products.

Organizations following prEN 2883 ensure their fastener components meet stringent requirements for safety, durability, and operational reliability in aerospace and high-performance engineering.

SLOVENSKI STANDARD
01-julij-2026
Aeronavtika - Matice, šestrobe, samozapiralne, z ugreznjeno in robljeno podložko,
iz toplotnoodpornega jekla, namazane z MoS2 - Klasifikacija: 1100 MPa (pri
temperaturi okolice)/315 °C
Aerospace series - Nuts, hexagonal, self-locking, with counterbore and captive washer,
in heat resisting steel, MoS2 lubricated - Classification : 1 100 MPa (at ambient
temperature) / 315 °C
Luft- und Raumfahrt - Sechskantmutter, selbstsichernd, mit zylindrischer Aussenkung
und Bördelscheibe, aus hochwarmfestem Stahl, MoS2 geschmiert - Klasse: 1 100 MPa
(bei Raumtemperatur)/315 °C
Ta slovenski standard je istoveten z: prEN 2883
ICS:
49.025.10 Jekla Steels
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2026
ICS 49.030.20 Will supersede EN 2883:2009
English Version
Aerospace series - Nuts, hexagonal, self-locking, with
counterbore and captive washer, in heat resisting steel,
MoS2 lubricated - Classification : 1 100 MPa (at ambient
temperature) / 315 °C
Luft- und Raumfahrt ¿ Sechskantmutter,
selbstsichernd, mit zylindrischer Aussenkung und
Bördelscheibe, aus hochwarmfestem Stahl, 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 2883:2026 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 . 7
6 Marking . 7
7 Technical specification . 7
7.1 General. 7
7.2 Approval of manufacturers . 7
7.3 Qualification of nuts . 7
Bibliography . 8

European foreword
This document (prEN 2883:2026) 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 2883:2009.
— Clause 3, “Terms and definitions”, added;
— 4.3, “Materials”, standards EN 2399, EN 3638, EN 3639 and SAE AMS5525 added;
— Clause 7, “Technical specification”, editorially revised.
1 Scope
This document specifies the characteristics of self-locking hexagonal nuts, wi
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