Aerospace series - 8° 30' interface for adaptors, threaded, with lockring - Geometric configuration

This standard specifies the dimensional characteristics of the 8°30' interface for adaptors, threaded, with lock-ring, assembly with elastomer O ring for aerospace applications.
This standard applies to all adaptors, threaded, with lockring assembled to EN 2607 and used in hydraulic systems with a maximum pressure of 28 000 kPa for which the principle of a metric size "dynamic beam seal" coupling with a 8°30' conical sealing surface has been selected.

Luft- und Raumfahrt - 8° 30'-Anschlusszapfen für gerade Einschraubverschraubungen mit Sicherungsring - Konstruktionsblatt

Diese Norm legt die Maße von 8°30' Anschlusszapfen für gerade Einschraubverschraubungen mit Siche¬rungs¬ring und Elastomer O Ring zur Verwendung in der Luft- und Raumfahrt fest.
Diese Norm gilt für alle geraden Einschraubverschraubungen mit Sicherungsring, die nach EN 2607 aufgebaut sind und in Hydraulikanlagen mit 28 000 kPa Höchstdruck verwendet werden, für die das Prinzip der Lippendichtung Verschraubung mit 8°30' Konus Dichtfläche gewählt wurde.

Série aérospatiale - Interface 8° 30' pour raccords a implanter, filetés, avec bague de sécurité - Configuration géométrique

Aeronavtika – Vmesnik 8° 30' za adapterje, z navojem, z zaklepnim obročkom – Geometrijski načrt

General Information

Status
Published
Publication Date
31-Aug-2006
ICS
49.030.99 - Other fasteners
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Sep-2006
Due Date
01-Sep-2006
Completion Date
01-Sep-2006
Ref Project
EN 2604:2005 - Aerospace series - 8° 30' interface for adaptors, threaded, with lockring - Geometric configuration

Overview

SIST EN 2604:2006 is a CEN/AECMA aerospace standard that specifies the geometric configuration and dimensional characteristics of the 8°30' conical sealing interface for threaded adaptors with lockring. It covers adaptors assembled with an elastomer O‑ring and is intended for aerospace hydraulic systems with nominal pressures up to 28 000 kPa. The standard supports metric-size "dynamic beam seal" couplings where the 8°30' conical sealing surface has been selected.

Key Topics

  • Scope & applicability: Applies to threaded adaptors with lockring assembled per EN 2607 to EN 2608 and used in fluid systems up to the specified pressure.
  • Geometric configuration: Defines the conical sealing angle (8°30') and the required dimensional interface to ensure consistent sealing performance and interchangeability.
  • Dimensional data: Includes figures and a table of required dimensions and tolerance designations for MJ thread sizes and port codes (see Table 1 in the standard).
  • Surface requirements: References surface roughness and finish requirements as indicated in the normative figures.
  • Designation: Provides the format for identity blocks and code designation to ensure clear specification and procurement.

Applications

SIST EN 2604:2006 is intended for engineers, designers, quality and procurement teams working in aerospace fluid systems. Typical use cases include:

  • Ensuring interchangeability of threaded adaptors and ports across aircraft hydraulic assemblies.
  • Specifying adaptor geometry during component design, procurement and inspection.
  • Supporting pressure integrity and sealing performance for systems using an elastomer O‑ring and lockring retention.

Benefits of applying SIST EN 2604:2006:

  • Interchangeability across manufacturers and airframes where the EN series is adopted.
  • Consistent sealing performance for metric dynamic‑beam seal couplings using the 8°30' interface.
  • Conformance to harmonized European aerospace practice, reducing design rework and compatibility risks.

Related Standards

SIST EN 2604:2006 references and interacts with several allied standards that should be used together for complete specification and verification:

  • ISO 5855-1 and ISO 5855-3 - MJ thread general requirements and limit dimensions for fluid systems
  • EN 2602 - Ports for adaptors, threaded, with lockring - Geometric configuration
  • EN 2603 - Port ends for adaptors, threaded, with lockring - Geometric configuration
  • EN 2607 - O‑rings for adaptors, threaded, with lockring - Survey
  • EN 2645 - Lockrings for adaptors, threaded, with lockring - Dimensions

Applying SIST EN 2604:2006 together with these normative references ensures complete and auditable specification of adaptor geometry, sealing components and retention hardware for aerospace hydraulic applications. For detailed dimensions, tolerance tables and figures, consult the full SIST EN 2604:2006 document.

Frequently Asked Questions

SIST EN 2604:2006 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - 8° 30' interface for adaptors, threaded, with lockring - Geometric configuration". This standard covers: This standard specifies the dimensional characteristics of the 8°30' interface for adaptors, threaded, with lock-ring, assembly with elastomer O ring for aerospace applications. This standard applies to all adaptors, threaded, with lockring assembled to EN 2607 and used in hydraulic systems with a maximum pressure of 28 000 kPa for which the principle of a metric size "dynamic beam seal" coupling with a 8°30' conical sealing surface has been selected.

This standard specifies the dimensional characteristics of the 8°30' interface for adaptors, threaded, with lock-ring, assembly with elastomer O ring for aerospace applications. This standard applies to all adaptors, threaded, with lockring assembled to EN 2607 and used in hydraulic systems with a maximum pressure of 28 000 kPa for which the principle of a metric size "dynamic beam seal" coupling with a 8°30' conical sealing surface has been selected.

SIST EN 2604:2006 is classified under the following ICS (International Classification for Standards) categories: 49.030.99 - Other fasteners. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 2604:2006 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - 8° 30' interface for adaptors, threaded, with lockring - Geometric configurationSérie aérospatiale - Interface 8° 30' pour raccords a implanter, filetés, avec bague de sécurité - Configuration géométriqueLuft- und Raumfahrt - 8° 30'-Anschlusszapfen für gerade Einschraubverschraubungen mit Sicherungsring - KonstruktionsblattTa slovenski standard je istoveten z:EN 2604:2005SIST EN 2604:2006en49.030.99ICS:SLOVENSKI
STANDARDSIST EN 2604:200601-september-2006

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2604
December 2005 ICS 49.030.99 English Version
Aerospace series – 8° 30' interface for adaptors, threaded, with lockring - Geometric configuration
Série aérospatiale - Raccords droits métriques avec bague de sécurité - Interface des raccords à 8° 30' - Dimensions Luft- und Raumfahrt – 8° 30'-Anschlusszapfen für gerade Einschraubverschraubungen mit Sicherungsring - Konstruktionsblatt This European Standard was approved by CEN on 28 October 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2604:2005: E
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