Aerospace series - Lockbolts, 100° countersunk normal head or protruding head, tension- / sheartype, close tolerance, in titanium alloy TI-P64001, anodized or with aluminium pigmented coating - Collars in titanium TI-P99002 or aluminium alloy 2024 - Metric series - Technical specification

This standard specifies the characteristics, qualification and acceptance requirements for tension- / sheartype 100° countersunk normal head or protruding head close tolerance lockbolts in titanium alloy TI P64001, anodized or with aluminium pigmented coating and collars in titanium TI-P99002 or aluminium alloy 2024, metric series, for use as permanent attachment fasteners in shear applications.
It is applicable whenever referenced.

Luft- und Raumfahrt - Paßniete, mit 100° normalem Senkkopf oder Universalkopf, Zug-/Schertyp, aus Titanlegierung TI-P64001, anodisiert oder mit aluminiumpigmentierter Beschichtung - Ringe aus Titan TI-P99002 oder Aluminiumlegierung 2024 - Metrische Reihe - Technische Lieferbedingung

Diese Norm legt die Merkmale sowie die Qualifikations  und Abnahmeanforderungen für Passniete, mit 100° normalem Senkkopf oder Universalkopf, für Zug /Scherbeanspruchung, aus Titanlegierung TI P64001, anodisiert oder mit aluminiumpigmentierter Beschichtung, und für Schließringe aus Titan TI P99002 oder Aluminiumlegierung 2024, metrische Reihe, zur Verwendung als unlösbare Verbindungselemente für scherbeanspruchte Anwendungen fest.
Sie ist immer dann anzuwenden, wenn auf sie verwiesen wird.

Série aérospatiale - Rivets a bague sertie, a tete fraisée 100° normale ou a tete cylindrique, a traction ou a cisaillement, a tolérance serrée, en alliage de titane TI-P64001, anodisés ou avec revetement alumino-organique - Bagues en titane TI-P99002 ou en alliage d'aluminium 2024 - Série métrique - Spécification technique

Aeronavtika – Zapirni vijaki, 100° ugreznjena ali dvignjena glava, natezni/strižni tip, ozka toleranca, iz titanove zlitine TI-P64001, anodizirani ali z aluminijem pigmentiranim premazom – Prirobnice iz titanove TI-P99002 ali aluminijeve zlitine 2024 – Metrska serija – Tehnična specifikacija

General Information

Status
Published
Publication Date
31-Aug-2006
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

Overview

EN 4176:2005 is a CEN aerospace technical specification for lockbolts (also called swage-lock rivets) intended as permanent attachment fasteners in shear applications. It covers 100° countersunk normal-head or protruding-head, tension-/shear-type, close-tolerance lockbolts manufactured in titanium alloy TI‑P64001 (anodized or with aluminium‑pigmented coating) and collars in titanium TI‑P99002 or aluminium alloy 2024. The standard applies to the metric series and sets out characteristics, qualification and acceptance requirements to be used whenever EN 4176 is referenced.

Key topics and technical requirements

  • Scope & use: Fasteners for permanent shear applications in aerospace structures; applies whenever referenced.
  • Design & dimensions: Head geometry (100° countersunk or protruding head), close-tolerance dimensions and surface texture requirements per conventional measuring methods.
  • Materials & finishes: Lockbolts in TI‑P64001 (6Al‑4V) with anodizing or aluminium‑pigmented coating; collars in TI‑P99002 or 2024 aluminium (specified tempers). Composition and material condition are mandated.
  • Mechanical properties & tests:
    • Tensile strength, single-shear strength and preload (clamping) force requirements are specified (see Table 3 for values by diameter).
    • Test methods referenced include NASM1312 methods for tensile and clamping, and MIL‑STD‑1916 inspection practices.
    • Qualification vs. acceptance testing: certain tests (e.g., shear/tensile) are mandatory for qualification; acceptance sampling plans are provided for production lots.
  • Quality assurance:
    • Manufacturer qualification per EN 9133 and supplier quality records retention (three years).
    • Sampling plans, inspection-lot definitions, AQL and metallurgical examination criteria (crack, seam, inclusions, surface discontinuities).
  • Product identification & delivery: Marking per part drawings, packaging rules (unit containers, protection against damage) and maximum package weights.

Applications

  • Use in aerospace structural assemblies where high-strength, corrosion‑resistant titanium lockbolts are required for shear-loaded joints.
  • Typical users: aerospace OEMs, fastener manufacturers, MRO suppliers, procurement/specification engineers, and quality/inspection teams responsible for conforming fasteners and incoming inspection.

Who should use EN 4176

  • Fastener manufacturers and qualifying laboratories preparing lockbolts and collars in the specified alloys.
  • Procurement and design engineers specifying fasteners for aircraft and spacecraft structural joints.
  • Quality managers and inspectors implementing acceptance sampling, test methods and traceability for aerospace parts.

Related standards

EN 4172, EN 4173, EN 4174, EN 4175, EN 4401, EN 4402 (related lockbolt/collar specifications); EN 9133 (qualification); MIL‑STD‑1916, NASM1312 and NAS/other referenced test/inspection documents.

Keywords: EN 4176:2005, aerospace lockbolts, titanium TI‑P64001, collars TI‑P99002, aluminium 2024, countersunk lockbolts, shear-type fasteners, close tolerance, metric series.

Frequently Asked Questions

SIST EN 4176:2006 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Lockbolts, 100° countersunk normal head or protruding head, tension- / sheartype, close tolerance, in titanium alloy TI-P64001, anodized or with aluminium pigmented coating - Collars in titanium TI-P99002 or aluminium alloy 2024 - Metric series - Technical specification". This standard covers: This standard specifies the characteristics, qualification and acceptance requirements for tension- / sheartype 100° countersunk normal head or protruding head close tolerance lockbolts in titanium alloy TI P64001, anodized or with aluminium pigmented coating and collars in titanium TI-P99002 or aluminium alloy 2024, metric series, for use as permanent attachment fasteners in shear applications. It is applicable whenever referenced.

This standard specifies the characteristics, qualification and acceptance requirements for tension- / sheartype 100° countersunk normal head or protruding head close tolerance lockbolts in titanium alloy TI P64001, anodized or with aluminium pigmented coating and collars in titanium TI-P99002 or aluminium alloy 2024, metric series, for use as permanent attachment fasteners in shear applications. It is applicable whenever referenced.

SIST EN 4176:2006 is classified under the following ICS (International Classification for Standards) categories: 49.025.20 - Aluminium; 49.025.30 - Titanium; 49.030.20 - Bolts, screws, studs. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 4176:2006 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.DOXPLQLMHPLuft- und Raumfahrt - Paßniete, mit 100° normalem Senkkopf oder Universalkopf, Zug-/Schertyp, aus Titanlegierung TI-P64001, anodisiert oder mit aluminiumpigmentierter Beschichtung - Ringe aus Titan TI-P99002 oder Aluminiumlegierung 2024 - Metrische Reihe - Technische LieferbedingungSérie aérospatiale - Rivets a bague sertie, a tete fraisée 100° normale ou a tete cylindrique, a traction ou a cisaillement, a tolérance serrée, en alliage de titane TI-P64001, anodisés ou avec revetement alumino-organique - Bagues en titane TI-P99002 ou en alliage d'aluminium 2024 - Série métrique - Spécification techniqueAerospace series - Lockbolts, 100° countersunk normal head or protruding head, tension- / sheartype, close tolerance, in titanium alloy TI-P64001, anodized or with aluminium pigmented coating - Collars in titanium TI-P99002 or aluminium alloy 2024 - Metric series - Technical specification49.030.20Sorniki, vijaki, stebelni vijakiBolts, screws, studs49.025.30TitanTitanium49.025.20AluminijAluminiumICS:Ta slovenski standard je istoveten z:EN 4176:2005SIST EN 4176:2006en01-september-2006SIST EN 4176:2006SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4176December 2005ICS 49.030.20 English VersionAerospace series - Lockbolts, 100
countersunk normal head orprotruding head, tension- / sheartype, close tolerance, intitanium alloy TI-P64001, anodized or with aluminium pigmentedcoating - Collars in titanium TI-P99002 or aluminium alloy 2024 -Metric series - Technical specificationSérie aérospatiale - Rivets à bague sertie, à tête fraisée100
normale ou à tête cylindrique, à traction ou àcisaillement, à tolérance serrée, en alliage de titane TI-P64001, anodisés ou avec revêtement alumino-organique -Bagues en titane TI-P99002 ou en alliage d'aluminium2024 - Série métrique - Spécification techniqueLuft- und Raumfahrt - Paßniete, mit 100
normalemSenkkopf oder Universalkopf, Zug- Schertyp, ausTitanlegierung TI-P64001, anodisiert oder mit Aluminiumpigmentierter Beschichtung - Ringe aus Titan TI-P99002oder Aluminiumlegierung 2024 - Metrische Reihe -Technische LieferbedingungThis European Standard was approved by CEN on 26 October 2005.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 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4176:2005: ESIST EN 4176:2006

1) Published as AECMA Prestandard at the date of publication of this standard. 2) Published by: American Society of Mechanical Engineers (ASME), 3, Park Avenue, New York, NY 10017, USA. 3) Published by: Department of Defense (DOD), the Pentagon, Washington, DC 20301, USA. 4) Published by: Aerospace Industries Association of America, Inc. (AIA), 1250 Eye Street, NW; Suite 1100, Washington, DC 20005, USA. SIST EN 4176:2006

Design and construction Conventional measuring methods Table 5 of MIL-STD-19165.1.1.1
Head protrusion (100° countersunk head) In accordance with the standard part drawings referenced within this specification NAS 527
NAS 527 5.1.2
Material Titanium alloy TI-P64001 (6Al-4V) – shear strength ≥ 675 MPa – Composition requirements apply to finished lockbolts. As described by lockbolt manufacturer to assure production parts conform to applicable specifications 5.1.2.1
Lubricant In accordance with standard part drawings reference this specification. See applicable specification Visual examination
Table 6 5.1.3
Dimensions Q 5.1.3.1
General dimensions Conventional measuring methods MIL-STD-19165.1.3.2
Surface texture The dimensions and any deviations in form and position, measured at ambient temperature, shall be within the limits specified in the definition document. B46.1 Visual examination A Table 4 5.1.4
Protective treatment 5.1.4.1
Finish In accordance with standard part drawings reference this specification. See applicable specification Visual examination
Table 6 qualification 5.1.5
Manufacturing 5.1.5.1
Heat treatment Shall develop mechanical properties as defined herein, without adverse effect on metallurgical properties as defined herein. Test of shear and metallurgical properties verifies heat treatment.
As applicable in accordance with test requirementsQ 5.1.6
Mechanical properties 5.1.6.1
Tensile strength Table 3 values are applicable to lockbolts having
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