SIST EN 4127:2009

Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, short thread, in titanium alloy, aluminium IVD coated - Classification: 1100 MPa (at ambient temperature)/425 °C

This standard specifies the characteristics of bolts, normal hexagonal head, coarse tolerance normal shank, short thread, in titanium alloy, aluminium IVD coated.
Classification: 1 100 MPa  ) / 425 °C  )

Luft- und Raumfahrt - Sechskantschrauben, kurzes Gewinde, aus Titanlegierung, Aluminium IVD beschichtet - Klasse: 1100 MPa (bei Raumtemperatur)/425 °C

Diese Norm legt die Eigenschaften von Sechskantschrauben mit kurzem Gewinde aus Titanlegierung, mit
IVD-Aluminium beschichtet, fest.
Klasse: 1 100 MPa1)/425 °C2)

Série aérospatiale - Vis à tête hexagonale normale, fût normal à tolérance large, filetage court, en alliage de titane, revêtues aluminium IVD - Classification: 1100 MPa (à température ambiante)/425 °C

Aeronavtika - Sorniki, normalna šestroba glava, široka toleranca, kratek navoj, iz titanove zlitine, prevlečeni z aluminijem IVD - Klasifikacija: 1100 MPa (pri temperaturi okolice)/425 °C

General Information

• Status: Published
• Publication Date: 20-Aug-2009
• ICS: 49.025.20 - Aluminium
• ICS: 49.025.30 - Titanium
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-Jul-2009
• Due Date: 17-Sep-2009
• Completion Date: 21-Aug-2009
• Ref Project: EN 4127:2009 - Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, short thread, in titanium alloy, aluminium IVD coated - Classification: 1 100 MPa (at ambient temperature) / 425 °C

Overview

EN 4127:2009 is a CEN aerospace standard that specifies the characteristics of bolts with a normal hexagonal head, coarse-tolerance normal shank and short thread, manufactured in a titanium alloy and finished with an aluminium IVD (ion vapor deposition) coating. The standard applies to bolts classified at 1 100 MPa tensile strength (ambient temperature) and rated for service temperatures up to 425 °C (maximum temperature determined by the surface treatment). Dimensions and tolerances follow established aerospace thread and bolt metrics.

Key topics and technical requirements

• Material and strength: Titanium alloy conforming to aerospace material guidance (TR 3775) with a minimum tensile strength of 1 100 MPa at ambient temperature.
• Surface treatment: Aluminium IVD coating (referencing MIL‑DTL‑83488D, Type II, Class 3) with nominal coating thickness 4–12 µm. Post-deposition processing includes mechanical blasting and chromate conversion (within 24 h) and optional lubrication (cethylic alcohol, code E).
• Geometry and threads: Bolt dimensions and tolerances are in accordance with ISO 3193 and ISO 5855-2 for MJ threads; lead/runout threads conform to ISO 3353‑1. Diameter codes range from 030 to 200 (covering MJ3×0.5 up to MJ20×1.5 as per the standard’s table).
• Form and position tolerances: Use ISO 7913 for tolerances of form and position.
• Marking and designation: Identification and marking rules reference EN 2424; example designation format is provided (EN4127H050040E).
• Quality and qualification: Manufacturer approval and quality systems are aligned with EN 9100; parts qualification follows EN 9133. Procurement guidance references ISO 9152 (with modifications noted in the standard).

Applications

• Use where high strength-to-weight and elevated-temperature resistance are required, for example:
  • Aircraft primary and secondary structures
  • Engine and hot-section fastenings where titanium properties and a corrosion-resistant aluminium IVD finish are needed
  • Aerospace assemblies requiring consistent thread and dimensional interchangeability
• Particularly suited to components needing certified aerospace fasteners with controlled surface treatment and traceable quality/marking.

Who uses this standard

• Aerospace OEMs and Tier 1/2 suppliers specifying fasteners
• Fastener manufacturers and coating processors producing titanium bolts
• Procurement and quality engineers enforcing conformity, marking, and qualification
• Maintenance organizations and procurement specialists sourcing replacement aerospace bolts

Related standards

• ISO 3193, ISO 3353‑1, ISO 5855‑2, ISO 7913, ISO 9152
• EN 2424 (marking), EN 9100 (quality), EN 9133 (qualification)
• TR 3775 (materials), MIL‑DTL‑83488D (aluminium coating)

Keywords: EN 4127:2009, aerospace bolts, titanium alloy bolts, aluminium IVD coated, hexagonal head bolts, MJ threads, aerospace fasteners.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Sechskantschrauben, kurzes Gewinde, aus Titanlegierung, Aluminium IVD beschichtet - Klasse: 1100 MPa (bei Raumtemperatur)/425 °CSérie aérospatiale - Vis à tête hexagonale normale, fût normal à tolérance large, filetage court, en alliage de titane, revêtues aluminium IVD - Classification:
1100 MPa (à température ambiante)/425 °CAerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, short thread, in titanium alloy, aluminium IVD coated - Classification: 1100 MPa (at ambient temperature)/425 °C49.030.20Sorniki, vijaki, stebelni vijakiBolts, screws, studs49.025.30TitanTitanium49.025.20AluminijAluminiumICS:Ta slovenski standard je istoveten z:EN 4127:2009SIST EN 4127:2009en,de01-oktober-2009SIST EN 4127:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4127
July 2009 ICS 49.030.20 English Version
Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, short thread, in titanium alloy, aluminium IVD coated - Classification: 1 100 MPa (at ambient temperature) / 425 °C
Série aérospatiale - Vis à tête hexagonale normale, fût normal à tolérance large, filetage court, en alliage de titane, revêtues aluminium IVD - Classification:
1 100 MPa (à température ambiante) / 425 °C
Luft- und Raumfahrt - Sechskantschrauben,
kurzes Gewinde, aus Titanlegierung, Aluminium IVD beschichtet - Klasse: 1 100 MPa (bei Raumtemperatur) / 425 °C This European Standard was approved by CEN on 20 May 2009.
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 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4127:2009: ESIST EN 4127:2009
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