Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, passivated, with aluminium pigmented coating - Classification: 1 550 MPa (at ambient temperature) / 315 °C

This standard specifies the characteristics of bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, passivated, with aluminium pigmented coating.
Classification: 1 550 MPa / 315 °C

Luft- und Raumfahrt - Sechskant-Passschrauben, mittlere Gewindelänge, aus hochwarmfester Nickelbasislegierung, passiviert, mit aluminiumpigmentierter Beschichtung - Klasse: 1 550 MPa (bei Raumtemperatur) / 315 °C

Diese Norm legt die Eigenschaften von Sechskant Passschrauben mit mittlerer Gewindelänge aus hoch¬warmfester Nickelbasislegierung, passiviert, mit aluminiumpigmentierter Beschichtung fest.
Klasse: 1 550 MPa ) /315 C )

Série aérospatiale - Vis a tete bihexagonale large, fut normal a tolérance serrée, filetage moyen, en alliage résistant a chaud a base de nickel, passivées, avec revetement alumino-organique - Classification : 1 550 MPa (a température ambiante) / 315 °C

Aeronavtika – Vijaki z veliko šestrobo glavo, polno steblo, ozka toleranca, srednja navojna dolžina, iz zlitine, odporne proti toploti, na nikljevi osnovi, pasivirani, z aluminijem pigmentiranim premazom – Klasifikacija: 1 550 MPa (pri temperaturi okolice) / 315 °C

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 4498:2005 is a CEN aerospace standard that specifies the characteristics of high‑strength bolts with a large bihexagonal head, close tolerance normal shank and medium length MJ thread, manufactured from a heat‑resisting nickel‑base alloy. These bolts are passivated and finished with an aluminium‑pigmented coating.
Classification:1 550 MPa (ambient tensile strength) / 315 °C (maximum service temperature determined by coating).

This standard defines dimensional, material, surface‑treatment, marking and procurement requirements for aerospace fasteners used where high temperature resistance and precise fit are required.

Key topics and technical requirements

  • Geometry & dimensions: Bolts conform to ISO 3186 dimensions (metric MJ threads). Dimensions and tolerances are expressed in millimetres and apply after coating; shank diameter tolerance before coating is specified.
  • Thread form and limits: MJ threads and lead/runout requirements per ISO 3353‑1 and limit dimensions per ISO 5855‑2.
  • Form & position tolerances: See ISO 7913 for tolerances of form and position.
  • Material: Heat‑resisting nickel‑base alloy selected per TR 3775; minimum tensile strength 1 550 MPa at ambient temperature.
  • Surface treatment & coating: Passivation per EN 2516 (or head electrolytic polishing per EN 3769 plus EN 2516 for whole bolt). Aluminium‑pigmented coating per EN 4474. Polishing code “P” used in designation when EN 3769 applied to head.
  • Lubrication: Cetyl alcohol (chlorine‑free) application recommended per MIL‑L‑87132.
  • Marking & designation: Marking follows EN 2424, style C plus MJ. Example designation: BOLT EN4498H050040P (standard number, hole code, diameter code, length code, polishing code).
  • Oversized bolts & procurement: Oversize rules per EN 4016; procurement/qualification references ISO 9154, EN 9100 (manufacturer approval) and EN 9133 (qualification procedure).

Applications

  • Fastening in aerospace structures and systems exposed to elevated temperatures (hot sections, engine and powerplant components, heat‑affected assemblies) where high tensile strength, precise fit and corrosion/oxidation resistance are required.
  • Use cases include structural assemblies, engine mountings and components requiring large wrenching surfaces (bihexagonal head) and controlled thread engagement.

Who uses this standard

  • Aerospace designers and structural engineers specifying fasteners
  • Fastener manufacturers and heat‑treatment/coating suppliers
  • Quality and procurement teams (aerospace OEMs and Tier supply chain)
  • MRO and inspectors verifying conformity of replacement parts

Related standards

Key referenced documents: ISO 3186, ISO 3353‑1, ISO 4095, ISO 5855‑2, ISO 7913, ISO 9154, EN 2424, EN 2516, EN 3769, EN 4016, EN 4474, EN 9100, EN 9133, TR 3775, MIL‑L‑87132.

Keywords: EN 4498:2005, aerospace bolts, nickel‑base alloy bolts, passivated, aluminium pigmented coating, 1550 MPa, 315 °C, bihexagonal head, MJ threads.

Frequently Asked Questions

SIST EN 4498:2006 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, passivated, with aluminium pigmented coating - Classification: 1 550 MPa (at ambient temperature) / 315 °C". This standard covers: This standard specifies the characteristics of bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, passivated, with aluminium pigmented coating. Classification: 1 550 MPa / 315 °C

This standard specifies the characteristics of bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, passivated, with aluminium pigmented coating. Classification: 1 550 MPa / 315 °C

SIST EN 4498:2006 is classified under the following ICS (International Classification for Standards) categories: 49.025.20 - Aluminium; 49.030.20 - Bolts, screws, studs. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 4498:2006 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)


SLOVENSKI STANDARD
01-september-2006
Aeronavtika – Vijaki z veliko šestrobo glavo, polno steblo, ozka toleranca, srednja
navojna dolžina, iz zlitine, odporne proti toploti, na nikljevi osnovi, pasivirani, z
aluminijem pigmentiranim premazom – Klasifikacija: 1 550 MPa (pri temperaturi
okolice) / 315 °C
Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank,
medium length thread, in heat resisting nickel base alloy, passivated, with aluminium
pigmented coating - Classification: 1 550 MPa (at ambient temperature) / 315 °C
Luft- und Raumfahrt - Sechskant-Passschrauben, mittlere Gewindelänge, aus
hochwarmfester Nickelbasislegierung, passiviert, mit aluminiumpigmentierter
Beschichtung - Klasse: 1 550 MPa (bei Raumtemperatur) / 315 °C
Série aérospatiale - Vis a tete bihexagonale large, fut normal a tolérance serrée, filetage
moyen, en alliage résistant a chaud a base de nickel, passivées, avec revetement
alumino-organique - Classification : 1 550 MPa (a température ambiante) / 315 °C
Ta slovenski standard je istoveten z: EN 4498:2005
ICS:
49.025.20 Aluminij Aluminium
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 4498
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2005
ICS 49.030.20
English Version
Aerospace series - Bolts, large bihexagonal head, close
tolerance normal shank, medium length thread, in heat resisting
nickel base alloy, passivated, with aluminium pigmented coating
- Classification: 1 550 MPa (at ambient temperature) / 315 °C
Série aérospatiale - Vis à tête bihexagonale large, fût Luft- und Raumfahrt - Sechskant-Paßschrauben, mittlere
normal à tolérance serrée, filetage moyen, en alliage Gewindelänge, aus hochwarmfester Nickelbasislegierung,
résistant à chaud à base de nickel, passivées, avec passivsiert, mit Aluminium pigmenttete Beschichtung -
revêtement alumino-organique - Classification : 1 550 MPa Klasse: 1 550 MPa (bei Raumtemperatur) / 315 °C
(à température ambiante) / 315 °C
This 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 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 Ref. No. EN 4498:2005: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Required characteristics .5
4 Designation .8
5 Marking .8
6 Technical specification.8
7 Oversized bolts .8

Foreword
This European Standard (EN 4498:2005) has been prepared by the European Association of Aerospace
Manufacturers - Standardization (AECMA-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
AECMA, 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 June 2006, and conflicting national standards shall be withdrawn at
the latest by June 2006.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] 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, 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 the United Kingdom.
1 Scope
This standard specifies the characteristics of bolts, large bihexagonal head, close tolerance normal shank,
medium length thread, in heat resisting nickel base alloy, passivated, with aluminium pigmented coating.
1) 2)
Classification: 1 550 MPa / 315 °C
2 Normative references
The following referenced document
...

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