SIST EN 6140:2020

Aerospace series - Plug, protective, non-metallic, for NAS1760 fitting ends and AS33649 boss ports

This document specifies the dimensions, tolerances and required characteristics of protective plugs,
non-metallic, for NAS1760 fitting ends and AS33649 boss ports to seal fluid ports during transportation
and storage in order to prevent
 contamination by moisture, fluids, chemicals and particles,
 spillage inside package or aircraft section,
 port and pipe end damages and
 port and pipe clogging due to plug ingestion.
Because of the cleanliness requirements, parts shall only be used once.

Luft- und Raumfahrt - Stopfen, nicht metallisch, zum Schutz für Endfittinge nach NAS1760 und Gehäuseanschlüsse nach AS33649

In diesem Dokument werden die Maße, Toleranzen und Kennwerte von nichtmetallischen Stopfen zum Schutz für Endfittinge nach NAS1760 und Gehäuseanschlüsse nach AS33649 festgelegt, mit denen Fluidanschlüsse während des Transports und der Aufbewahrung verschlossen werden, um Folgendes zu verhindern:
- Verunreinigung durch Feuchtigkeit, Fluide, Chemikalien und Partikel;
- Leckage innerhalb der Verpackung oder einer Luftfahrzeugsektion;
- Beschädigung an Anschlüssen und Rohrenden; und
- Verstopfung von Anschlüssen und Rohren aufgrund des Ansaugens der Stopfen.
Wegen der Reinheitsanforderungen dürfen die Teile stets nur einmal verwendet werden.

Série aérospatiale - Fiche, de protection, non métallique, pour raccords NAS1760 et trous de bossage AS33649

Le présent document spécifie les dimensions, les tolérances et les caractéristiques requises pour les fiches de protection, non métalliques, pour raccords NAS1760 et trous de bossage AS33649, destinés à l’étanchéité des orifices pour les liquides pendant le transport et le stockage afin d’éviter :
- une contamination par moisissure, fluides, produits chimiques et particules,
- un renversement à l’intérieur de l’emballage ou de la section de l’aéronef,
- des endommagements des orifices et de l'extrémité des tuyaux, et
- le bouchage des orifices et des tuyaux à cause de l'absorption de la fiche.
En raison des exigences de propreté, les pièces ne doivent être utilisées qu’une seule fois.

Aeronavtika - Vtič, zaščita, nekovinska, za končno vgradnjo po NAS1760 in glavni vhod AS33649

General Information

• Status: Published
• Publication Date: 11-Oct-2020
• ICS: 49.080 - Aerospace fluid systems and components
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 08-Oct-2020
• Due Date: 13-Dec-2020
• Completion Date: 12-Oct-2020
• Ref Project: EN 6140:2020 - Aerospace series - Plug, protective, non-metallic, for NAS1760 fitting ends and AS33649 boss ports

Overview

EN 6140:2020 - Aerospace series - Plug, protective, non‑metallic, for NAS1760 fitting ends and AS33649 boss ports - is a CEN European standard specifying the design, materials and quality requirements for non‑metallic protective plugs used to seal hydraulic/fluid ports in aerospace applications. The standard defines dimensions, tolerances, performance and packaging to prevent contamination, spillage and port damage during storage and transport.

Key topics and requirements

• Purpose: Seal NAS1760 fitting ends and AS33649 boss ports to prevent moisture, fluids, chemicals, particles, spillage and plug ingestion.
• Configuration & dimensions: Detailed geometry, tolerances and mass are defined (refer to Figure 1 / Table 2 in the standard). Unspecified linear tolerances: ISO 2768‑m.
• Material & colour: Specified as high‑density polyethylene (HD‑PE) with density 0.940–0.970 and Melt Flow Index 7.5–15.0. Colour examples: red (AMS‑STD‑595 references).
• Environmental & mechanical limits:
  • Proof pressure: 100 kPa (1 bar).
  • Storage/transport temperature: −54 °C to 85 °C.
  • Installation/removal at room temperature (25 ± 10) °C.
• Cleanliness: Parts must meet ISO 11218 class 7 or better; because of cleanliness requirements plugs are intended for single use.
• Sealing & testing:
  • Sealing surfaces must mate consistently with associated fitting dimensions (illustrated in the standard).
  • Qualification: 3 specimens per size for general tests; first article inspection: 6 specimens tested at proof pressure for 3 minutes.
• Marking & packaging:
  • Marking per EN 2424 (part designation + manufacturer/trademark/CAGE code).
  • Individual chlorine‑free packaging, protected against contamination and damage; cleanliness maintained until package opening.
• Manufacturing & inspection:
  • Manufacturers should have an aerospace quality management system (e.g., EN 9100).
  • Supplier responsible for inspection unless contract specifies otherwise.

Applications and who uses it

• Primary use: Temporary sealing of hydraulic and fluid ports on aircraft components, hose assemblies and pipes during manufacturing, storage, shipment and maintenance.
• Typical users:
  • Aerospace OEMs and suppliers producing NAS1760 / AS33649 interfaces
  • MRO organizations and aircraft maintenance teams
  • Quality, procurement and logistics engineers specifying protective plugs for transport and storage
  • Component manufacturers qualifying plug designs and materials

Related standards

• EN 2424 (marking), EN 6079 (flareless fittings), ISO 2768, ISO 3161, ISO 9940 (phosphate ester hydraulic fluids), ISO 11218 (cleanliness), AS4395B, AS5202A, EN 9100 (quality management).

Keywords: EN 6140:2020, protective plug, non‑metallic plug, NAS1760, AS33649, aerospace hydraulic ports, HD‑PE plug, sealing, cleanliness, proof pressure, packaging.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2020
Aeronavtika - Vtič, zaščita, nekovinska, za končno vgradnjo po NAS1760 in glavni
vhod AS33649
Aerospace series - Plug, protective, non-metallic, for NAS1760 fitting ends and AS33649
boss ports
Luft- und Raumfahrt - Stopfen, nicht metallisch, zum Schutz für Endfittinge nach
NAS1760 und Gehäuseanschlüsse nach AS33649
Série aérospatiale - Fiche, de protection, non métallique, pour raccords NAS1760 et
trous de bossage AS33649
Ta slovenski standard je istoveten z: EN 6140:2020
ICS:
49.080 Letalski in vesoljski Aerospace fluid systems and
hidravlični sistemi in deli components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 6140
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 49.080
English Version
Aerospace series - Plug, protective, non-metallic, for
NAS1760 fitting ends and AS33649 boss ports
Série aérospatiale - Fiche, de protection, non Luft- und Raumfahrt - Stopfen, nicht metallisch, zum
métallique, pour raccords NAS1760 et trous de bossage Schutz für Endfittinge nach NAS1760 und
AS33649 Gehäuseanschlüsse nach AS33649
This European Standard was approved by CEN on 22 December 2019.

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, Turkey 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 6140:2020 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 . 5
4.1 Configuration, dimensions, tolerances and mass . 5
4.2 Material, surface treatment and colour . 5
4.3 Sealing areas . 5
4.4 Proof pressure . 5
4.5 Temperature range . 5
4.5.1 Storage and transportation temperature . 5
4.5.2 Installation and removal . 5
4.5.3 Cleanliness . 5
5 Technical requirement. 7
5.1 General . 7
5.2 First article inspection . 7
6 Designation. 7
7 Marking . 7
8 Packaging . 7
9 Technical specification . 9
9.1 Simple standard part . 9
9.2 Production lot (batch) . 9
9.3 Materials . 9
9.4 Approval of manufacturers . 9
9.5 Responsibility for inspection . 10
9.6 Labelling . 10
9.7 Unit and transport packages . 10
Bibliography . 11

European foreword
This document (EN 6140:2020) 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 March 2021, and conflicting national standards shall
be withdrawn at the latest by March 2021.
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.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This document specifies the dimensions, tolerances and required characteristics of protective plugs,
non-metallic, for NAS1760 fitting ends and AS33649 boss ports to seal fluid ports during transportation
and storage in order to prevent
 con
...