SIST EN 2591-502:2004

• Abstract:

  This standard specifies a method of verifying that an oversize test pin cannot enter a female contact of the restricted entry type used in elements of electrical and optical connection.; It shall be used together with EN 2591-100.

• Status: Published
• Publication Date: 30-Apr-2004
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I08 - Imaginarni 08
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-May-2004
• Due Date: 01-May-2004
• Completion Date: 01-May-2004
• Ref Project: EN 2591-502:2001 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 502: Restricted entry

• Refers: SIST EN 2591-100:2024 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 100: General
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-017:2026 - Aerospace series - Electrical contacts used in elements of connection - Part 017: Contacts, electrical, relay base, female, type A, crimp, class P - Product standard
• Effective Date: 24-Jun-2026
• Referred By: SIST EN 3155-045:2026 - Aerospace series - Electrical contacts used in elements of connection - Part 045: Contacts, electrical, female, type A, double crimping, class T - Product standard
• Effective Date: 10-Jun-2026
• Referred By: SIST EN 3155-071:2026 - Aerospace series - Electrical contacts used in elements of connection - Part 071: Contacts, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 10-Jun-2026
• Referred By: SIST EN 3155-015:2026 - Aerospace series - Electrical contacts used in elements of connection - Part 015: Contacts, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 29-Apr-2026
• Referred By: SIST EN 3155-003:2026 - Aerospace series - Electrical contacts used in elements of connection - Part 003: Contacts, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 15-Apr-2026
• Referred By: SIST EN 3155-083:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 083: Contact, electrical, female, type A, crimp, class S, size 8 - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-066:2014 - Aerospace series - Electrical contacts used in elements of connection - Part 066: Contacts, electrical, female, type A, crimp, class S, size 8 - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3645-001:2019 - Aerospace series - Connectors, electrical, circular, scoop-proof, triple start threaded coupling, operating temperature 175 °C or 200 °C continuous - Part 001: Technical specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-009:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 009: Contacts, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-009:2009 - Aerospace series - Electrical contacts used in elements of connection - Part 009: Contacts, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2997-001:2017 - Aerospace series - Connectors, electrical, circular, coupled by threaded ring, fire-resistant or non fire-resistant, operating temperatures - 65 °C to 175 °C continuous, 200 °C continuous, 260 °C peak - Part 001: Technical specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-014:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 014: Contacts, electrical, male, type A, crimp, class S - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-001:2025 - Aerospace series - Electrical contacts used in elements of connection - Part 001: Technical Specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-071:2015 - Aerospace series - Electrical contacts used in elements of connection - Part 071: Contacts, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 28-Jan-2026

SIST EN 2591-502:2004 is a European standard for aerospace series elements of electrical and optical connection. It specifies a test method for checking that an oversize test pin cannot enter a female contact of the restricted entry type, and it is used together with EN 2591-100.

What does SIST EN 2591-502:2004 specify?

SIST EN 2591-502:2004 specifies one test method for verifying restricted entry in female contacts used in aerospace electrical and optical connection elements. The purpose is practical: to confirm that a pin that is too large cannot be inserted into the contact opening.

The document is organized into a short scope, normative references, specimen preparation, and the method itself. Its main reference is EN 2591-100, which provides the general test-method framework used with this part.

What are the key requirements of SIST EN 2591-502:2004?

SIST EN 2591-502:2004 focuses on a single acceptance check: the oversize test pin shall not be able to enter the female contact.

Specimen preparation

Specimens shall be prepared according to the technical specification. Where the technical specification does not state the details, the following items have to be identified:

• the definition of the test pin for each contact size
• the number of specimens
• the requirement to be applied

In practice, this means the user must decide before testing which pin represents each contact size and how many samples will be tested, so the test can be repeated consistently.

Test procedure

SIST EN 2591-502:2004 requires a specified test pin to be presented along the axis of the female contact to simulate insertion. This aligns the pin with the contact opening in the same way a mating part would approach it.

In practice, the setup checks the entry geometry directly rather than using a functional mating test. That makes the result focused on the restricted-entry feature itself.

Acceptance requirement

The test pin shall not be capable of entering the female contact.

In practice, a pass means the restricted-entry design prevents insertion of a pin that is larger than allowed. A fail indicates that the contact opening does not provide the intended restriction.

Use with EN 2591-100

SIST EN 2591-502:2004 shall be used together with EN 2591-100. EN 2591-100 provides the general rules for aerospace test methods, so users should apply that part alongside this one when preparing and running the test.

What terms does SIST EN 2591-502:2004 use?

• Restricted entry - a female contact design intended to stop an oversize pin from entering.
• Female contact - the contact element that receives a mating pin during insertion.
• Test pin - the pin used to simulate insertion during the verification test.
• Oversize test pin - a test pin selected to be too large for the restricted entry opening.
• Contact size - the size category for which the test pin is defined.
• Technical specification - the document that can set the specimen and test details for the product under test.

Who uses SIST EN 2591-502:2004?

SIST EN 2591-502:2004 is used by aerospace manufacturers, test laboratories, and quality teams working with electrical and optical connection elements. It is relevant when they need to verify contact geometry, qualify parts, or check incoming or production samples against a restricted-entry requirement.

Buyers and engineers can use it when selecting connectors or contacts for aerospace systems where preventing incorrect insertion matters. Test personnel use it to set up the pin, align it with the contact axis, and record whether entry is prevented.

Which standards are used with SIST EN 2591-502:2004?

• EN 2591-100 - the general test-method part that is used together with this standard and provides the common framework for aerospace series test methods.

What does the SIST EN 2591-502:2004 document contain?

SIST EN 2591-502:2004 contains a brief scope, one normative reference, specimen-preparation instructions, and a single test method with its requirement. The method describes presenting a specified pin on the axis of the female contact to simulate insertion.

The document is aimed at test execution rather than design detail. It gives the user enough structure to prepare specimens, define the pin and sample count where needed, and judge the result from whether the pin enters or not.

Its content is narrowly focused on restricted-entry verification for aerospace electrical and optical connection elements.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Elements of electrical and optical connection - Test methods - Part 502: Restricted entryLuft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prüfverfahren - Teil 502: Verengter KontakteingangSérie aérospatiale - Organes de connexion électrique et optique - Méthodes d'essais - Partie 502 : Entrée restreinteAerospace series - Elements of electrical and optical connection - Test methods - Part 502: Restricted entry49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 2591-502:2001SIST EN 2591-502:2004en01-maj-2004SIST EN 2591-502:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2591-502November 2001ICS 49.060English versionAerospace series - Elements of electrical and optical connection- Test methods - Part 502: Restricted entrySérie aérospatiale - Organes de connexion électrique etoptique - Méthodes d'essais - Partie 502: Entrée restreinteLuft- und Raumfahrt - Elektrische und optischeVerbindungselemente - Prüfverfahren - Teil 502: VerengterKontakteingangThis European Standard was approved by CEN on 4 June 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2591-502:2001 ESIS
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