oSIST prEN 2288:2026

• Status: Not Published
• Public Enquiry End Date: 09-Sep-2026
• ICS: 49.030.99 - Other fasteners
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 15-Jul-2026
• Due Date: 02-Dec-2026
• Completion Date: 11-Sep-2026
• Ref Project: prEN 2288 - Aerospace series - Bush, flanged, corrosion resisting steel, with self-lubricating liner - Dimensions and loads

• Revises: SIST EN 2288:2019 - Aerospace series - Bush, flanged, corrosion resisting steel, with self-lubricating liner - Dimensions and loads
• Effective Date: 03-May-2023

oSIST prEN 2288:2026 is the Slovenian standard identical to draft European Standard prEN 2288 from CEN. It specifies flanged bushes in corrosion resisting steel with a self-lubricating liner for aerospace assemblies, including their dimensions, loads, materials, marking and design recommendations. It is written for designers, manufacturers and quality teams that need a common part definition for fixed and moving aerospace parts.

What does oSIST prEN 2288:2026 specify?

oSIST prEN 2288:2026 specifies the characteristics of flanged bushes in corrosion resisting steel with a self-lubricating liner, plus design guidance for the shafts and housings they run in. The bushes are intended for interference-fit assembly and for operation from -55 °C to 163 °C.

The document is organized into these clauses:

• 1 Scope
• 2 Normative references
• 3 Terms and definitions
• 4 Requirements
• 5 Designation
• 6 Marking
• 7 Technical specification
• 8 Design recommendation
• 9 Quality management system

What are the key requirements of oSIST prEN 2288:2026?

The core requirements are in Clause 4, with installation and quality requirements in Clauses 8 and 9. In practice, this is the part that tells a supplier what geometry, materials, finish and identification the bush must have.

Dimensions, mass and surface finish

Clause 4.1 ties the bush configuration to Figure 1 and the dimensions and masses to Figure 1 and Table 1, after surface treatment. Only bushes whose masses fall within the bold limits are standard, and the recommended sizes are marked with an asterisk. Clause 4.2 requires the surface roughness to follow Figure 1. For a buyer or designer, this is the basis for part interchangeability and for checking whether a proposed size is one of the standard options.

Materials and liner

Clause 4.3 specifies the bush material as steel S80/AISI431, with listed acceptable material references including EN 3490, EN 3161 and 1.4044 per WL1.4044, or an equivalent according to TR 4661. The liner must be a self-lubricating, wear-resistant material consistent with EN 2311. This matters because the bush performance depends on both the steel body and the liner system.

Surface treatment

Clause 4.4 uses a simple coding system: no code means no surface treatment, while code T means passivated. The passivation must follow AMS 2700 by the listed methods and types. That gives procurement and inspection teams a clear way to specify corrosion protection.

Designation and marking

Clause 5 defines the designation structure using the diameter code, length code, surface treatment code and technology code. Table 3 identifies technology code A for a bonded fabric liner and B for an injection moulded liner; no code means either technology may be used at the user's convenience. Clause 6 requires each bush and its package to carry the identity block, with the manufacturer’s technology stated, and marking to follow EN 2424.

Installation and loads

Clause 8 says the bushes are intended for interference fit installation, and the loads in Table 2 can only be assured if the recommended mounting is used. The figure and text specify housing diameter H7, shaft diameter f6, and a minimum shaft hardness of 50 HRC. In practice, this means the stated loads are tied to the mounting conditions, not just the bush itself.

Quality management

Clause 9 requires the manufacturer to be an approved production organization for aerospace products and to maintain a quality management system such as EN 9100 or an equivalent aerospace-accepted system. For supply chains, this links the part standard to controlled aerospace production.

What terms does oSIST prEN 2288:2026 use?

• Interference fit - the bush is installed into the housing with a tight fit, which is why the mounting conditions affect the achievable loads.
• Self-lubricating liner - the wear-resistant liner provides low-friction running without separate lubrication being part of the part definition.
• Passivated - code T means the steel has a corrosion-resistance treatment according to AMS 2700.
• Technology code - the designation uses A for a bonded fabric liner and B for an injection moulded liner.
• Rockwell C hardness (HRC) - the shaft hardness requirement in Clause 8 is stated on this scale.
• H7 and f6 - these fit designations are used for the housing and shaft dimensions in the installation recommendation.
• Quality management system (QMS) - Clause 9 requires an aerospace production QMS such as EN 9100.

Who uses oSIST prEN 2288:2026?

oSIST prEN 2288:2026 is used in aerospace design, procurement, manufacturing and inspection. Designers use it to select the bush, define the shaft and housing interface, and set the installation conditions. Suppliers use it to make the part to the correct dimensions, materials and marking. Quality managers use it to check conformance, production control and the aerospace quality management system requirements.

What changed in oSIST prEN 2288:2026 from the previous edition?

According to the foreword, this edition:

• updates the normative references
• adds Clause 3, Terms and definitions
• updates Clause 4, Requirements, with surface treatment requirements
• updates Clause 4.3, Materials
• adds Clause 4.4, Surface treatment
• updates the bibliography
• includes editorial revisions

It supersedes EN 2288:2019.

Which standards are used with oSIST prEN 2288:2026?

• EN 2311 - provides the technical specification for bushes with self-lubricating liner and gives the load definitions referenced in Table 2.
• EN 2424 - sets the marking method for aerospace products.
• EN 3161 - gives one acceptable steel material reference for the bush body.
• EN 3490 - gives another acceptable steel material reference for the bush body.
• AMS 2700 - defines the passivation method used when surface treatment code T is selected.
• WL1.4044 - provides another permitted stainless steel material reference.
• TR 4661 - supports equivalent material and surface-treatment selection for aerospace bearings and flight controls.
• EN 9100 - is cited as an example of an acceptable aerospace quality management system.

What does the oSIST prEN 2288:2026 document contain?

The document contains Figure 1 for the bush configuration, Table 1 for dimensions and masses, Figure 2 for the installation recommendation, and Table 2 for permissible loads. It also contains a designation example and Table 3 for technology codes. The load table gives axial and radial load data, while the notes point to EN 2311 for load definitions. In practice, these tables and figures are used for design, part selection, checking installation, and verifying supplier compliance.

SLOVENSKI STANDARD
01-september-2026
Aeronavtika - Puše s prirobnico iz korozijsko odpornega jekla s samomazalno
oblogo - Mere in obremenitve
Aerospace series - Bush, flanged, corrosion resisting steel, with self-lubricating liner -
Dimensions and loads
Luft- und Raumfahrt - Buchse mit Flansch aus korrosionsbeständigem Stahl mit
selbstschmierender Beschichtung - Maße und Belastungen
Ta slovenski standard je istoveten z: prEN 2288
ICS:
49.030.99 Drugi vezni elementi Other fasteners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2026
ICS 49.030.99 Will supersede EN 2288:2019
English Version
Aerospace series - Bush, flanged, corrosion resisting steel,
with self-lubricating liner - Dimensions and loads
Luft- und Raumfahrt - Buchse mit Flansch aus
korrosionsbeständigem Stahl mit selbstschmierender
Beschichtung - Maße und Belastungen
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 2288:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Requirements . 4
4.1 Configuration — Dimensions — Masses . 4
4.2 Surface roughness . 4
4.3 Material . 5
4.4 Surface treatment . 5
5 Designation . 9
6 Marking . 10
7 Technical specification . 10
8 Design recommendation . 10
9 Quality management system. 11
Bibliography. 12

European foreword
This document (prEN 2288:2026) 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 2288:2019.
— normative references updated;
— Clause 3 “Terms and definitions” added;
— Clause 4 “Requirements” updated with surface treatment requirements;
— 4.3 “Materials” updated;
— 4.4 “Surface treatment” added;
— bibliography updated;
— document editorially revised.
1 Scope
This document specifies the characteristics of flanged bushes in corrosion resisting steel with self-
lubricating liner and the design recommendation of shafts and housings.
The bushes are intended for operation within the temperature range of −55 °C to 163 °C and assembly
with an interference fit into fixed and moving aerospace parts.
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 2311, Aerospace series — Bushes with self-lubricating liner — Technical specification
EN 2424, Aerospace series — Marking of aerospace products
EN 3161, Aerospace series — Steel FE-PM3801 (X5CrNiCu17-4) — Air melted, solution treated and
precipitation treated, bar a or D ≤ 200 mm, R ≥ 930 MPa
m
EN 3490, Aerospace series — Steel X15CrNi17-3 (1.4057) — Air melted — Hardened and tempered —
Bars for machining — D ≤ 200 mm — 900 MPa ≤ R ≤ 1 100 MPa
e m
AMS 2700, Passivation of Corrosion Resistant Steels
WL1.4044, Stainless heat-treatable chromium steel with about 0.2 C-17 Cr-2 Ni;rods and forgings
TR 4661, Aerospace series — Bearings, flight controls — Materials and surface treatments
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Re
...