SIST EN 3278:2026

Aerospace series - Sleeves, tubular, protruding head, in corrosion resisting steel, passivated (0,25 mm wall thickness)

This document specifies the characteristics and technical requirements for protruding head tubular sleeves, in corrosion resisting steel, which can be plain or provided with a series of annular grooves.
Passivated sleeves are for use in aerospace assemblies whose maximum operating temperature does not exceed 650 °C. It is important that the operating temperatures for aluminium pigmented sleeves do not exceed 230 °C.

Luft- und Raumfahrt - Hülsen, überstehender Kopf, aus korrosionsbeständigem Stahl, passiviert (Wanddicke 0,25 mm)

No Scope available

Série aérospatiale - Douilles tubulaires, tête saillante en acier résistant à la corrosion, passivées (épaisseur de paroi 0,25 mm)

Le présent document spécifie les caractéristiques et les exigences techniques des douilles tubulaires, à tête saillante, en acier résistant à la corrosion, qui peuvent être lisses ou munies d’une série de rainures circulaires.
Les douilles passivées sont prévues pour utilisation dans les assemblages aéronautiques dont la température maximale de fonctionnement ne dépasse pas 650 °C. Il est important de ne pas exposer les douilles pigmentées d’aluminium à des températures de fonctionnement supérieures à 230 °C.

Aeronavtika - Obojke, cevaste, štrleče glave, iz korozijsko odpornega jekla, pasivirane (debelina stene 0,25 mm)

Ta dokument določa značilnosti in tehnične zahteve za izbočene glave cevastih puš, izdelanih iz korozijsko odpornega jekla, ki so lahko gladke ali opremljene s serijo obročastih utorov.
Pasivirane puše so namenjene uporabi v letalskih sestavih, katerih največja obratovalna temperatura ne presega 650 °C. Pomembno je, da obratovalne temperature za aluminijem pigmentirane puše ne presegajo 230 °C.

General Information

• Status: Published
• Public Enquiry End Date: 26-Nov-2024
• Publication Date: 30-Mar-2026
• ICS: 49.030.99 - Other fasteners
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 18-Mar-2026
• Due Date: 23-May-2026
• Completion Date: 31-Mar-2026
• Ref Project: EN 3278:2026 - Aerospace series - Sleeves, tubular, protruding head, in corrosion resisting steel, passivated (0,25 mm wall thickness)

Relations

• Revises: SIST EN 3278:2020 - Aerospace series - Sleeves, tubular, protruding head, in corrosion resisting steel, passivated (0,25 mm wall thickness)
• Effective Date: 06-Dec-2023

Overview

FprEN 3278 defines requirements for aerospace-series tubular sleeves with a protruding head, manufactured in corrosion-resisting steel, passivated, with a nominal 0,25 mm wall thickness. The standard covers plain and grooved sleeve forms, dimensional limits, surface finish, material options, manufacturing method and marking. These sleeves are specified for use in aerospace assemblies with maximum operating temperatures up to 650 °C (note: aluminium-pigmented sleeves must not exceed 230 °C).

Key topics and technical requirements

• Configuration & dimensions: Detailed dimensional tables and tolerances for diameter and length codes (examples: diameter codes 040–100; form codes P = plain, G = grooved). Surface roughness requirements are given relative to figures and tables in the standard.
• Material: Acceptable materials include steels in accordance with EN 2175 or A‑286 CRES (UNS S66286) per SAE AMS 5525, supplied annealed and cold-worked during manufacture.
• Manufacture: Sleeves shall be produced by a drawing process from sheet or strip to form a one‑piece tubular section and head.
• Surface treatment:
  • Passivation per EN 2516 or SAE AMS 2700 (method 1 types 6–8 or method 2).
  • Optional aluminium-pigmented coating (code “Z”) per EN 4473 Type IV or NAS4006 Class NC - applied to outer surface; inner coating optional. Aluminium‑pigmented sleeves are temperature‑limited to 230 °C.
• Surface appearance: Sleeves must be free from cracks, seams and laps; axial drawing flow lines and slight orange‑peel are permissible if continuous at fillet radius.
• Quality & sampling: Inspection sampling per ISO 2859‑1 (AQL = 1%).
• Designation & marking: Example designation: SLEEVE EN 3278 P 040 045 Z. Marking follows EN 2424, style G; package quantity must be stated.

Applications and who uses this standard

• Who: aerospace OEMs, fastener and sleeve manufacturers, procurement teams, design and stress engineers, quality assurance and inspection teams, maintenance/repair organizations.
• Where: specification of thin‑walled, corrosion‑resistant sleeves used as joining or fastener components in aircraft and aerospace assemblies where controlled dimensions, surface finish and high‑temperature passivation are required.
• Why: ensures interchangeability, corrosion resistance, traceability and consistent quality for critical aerospace fastening components.

Related standards (normative references)

• EN 2175, EN 2424, EN 2516, EN 4473
• ISO 2859‑1 (sampling), SAE AMS 2700, SAE AMS 5525, NAS4006

Keywords: FprEN 3278, aerospace sleeves, tubular sleeves, protruding head, corrosion resisting steel, passivated, 0.25 mm wall thickness, grooved sleeves, aluminium pigmented coating, AQL 1%.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2026
Aeronavtika - Obojke, cevaste, štrleče glave, iz korozijsko odpornega jekla,
pasivirane (debelina stene 0,25 mm)
Aerospace series - Sleeves, tubular, protruding head, in corrosion resisting steel,
passivated (0,25 mm wall thickness)
Luft- und Raumfahrt - Hülsen, überstehender Kopf, aus korrosionsbeständigem Stahl,
passiviert (Wanddicke 0,25 mm)
Série aérospatiale - Douilles tubulaires, tête saillante en acier résistant à la corrosion,
passivées (épaisseur de paroi 0,25 mm)
Ta slovenski standard je istoveten z: EN 3278:2026
ICS:
49.030.99 Drugi vezni elementi Other fasteners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 3278
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2026
EUROPÄISCHE NORM
ICS 49.030.99 Supersedes EN 3278:2019
English Version
Aerospace series - Sleeves, tubular, protruding head, in
corrosion resisting steel, passivated (0,25 mm wall
thickness)
Série aérospatiale - Douilles tubulaires, tête saillante Luft- und Raumfahrt - Hülsen, überstehender Kopf, aus
en acier résistant à la corrosion, passivées (épaisseur korrosionsbeständigem Stahl, passiviert (Wanddicke
de paroi 0,25 mm) 0,25 mm)
This European Standard was approved by CEN on 2 February 2026.

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-CENELEC 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-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.
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. EN 3278:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 5
4.1 Configuration — Dimensions — Tolerances . 5
4.2 Surface roughness . 5
4.3 Material . 5
4.4 Surface treatment . 5
4.5 Form code . 5
5 Technical requirements . 8
5.1 Manufacture . 8
5.2 Surface appearance . 8
5.3 Sampling . 8
6 Designation . 8
7 Marking . 8

European foreword
This document (EN 3278:2026) 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 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 September 2026, and conflicting national standards shall
be withdrawn at the latest by September 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 3278:2019.
This document includes the following significant technical changes with respect to EN 3278:2019:
— normative references updated;
— 4.3 and 4.4 expanded with additional options.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gree
...