Aerospace series - Bolts, double hexagon head, close tolerance, medium thread length, in heat resisting nickel base alloy NI-P100HT (Inconel 718), uncoated - Classification: 1 275 MPa/650 °C

This standard specifies the dimensions of uncoated double hexagon head bolts, close tolerance, with MJ-thread, medium thread length, in heat resisting nickel base alloy NI-P100HT for aerospace applications.
Maximum test temperature of the parts is 650 °C.
These bolts are to be used in aerospace fastening systems mainly stressed in shearing force..

Luft- und Raumfahrt - Zwölftkant-Passschrauben, mittlere Gewindelänge, aus hochwarmfester Nickelbasislegierung NI-P100HT (Inconel 718), blank - Klasse: 1 275 MPa/650 °C

Diese Norm legt die Maße von blanken Zwölfkant-Passschrauben, mittlerer Gewindelänge, aus hochwarm¬fester Nickelbasislegierung NI PH2601 für die Verwendung in der Luft- und Raumfahrt fest.
Die maximale Prüftemperatur der Teile beträgt 650 °C.
Diese Schrauben sind in Verbindungssystemen der Luft- und Raumfahrt zu verwenden, die hauptsächlich auf Scherkraft beansprucht werden.

Série aérospatiale - Vis de précision à tête bihexagonale à filetage moyen en alliage résistant à chaud à base de nickel NI-P100HT (Inconel 718), non revêtu - Classification: 1 275 MPa/650 °C

Aeronavtika - Sorniki, dvojna šestroba glava, ozka toleranca, srednja navojna dolžina, iz toplotnoodporne zlitine na nikljevi osnovi NI-P100HT (Inconel 718), brez prevleke - Klasifikacija: 1 275 MPa/650 °C

General Information

Status
Published
Publication Date
29-Jul-2008
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
17-Jul-2008
Due Date
21-Sep-2008
Completion Date
30-Jul-2008

Relations

Effective Date
12-Feb-2025

Overview

EN 3327:2008 defines dimensional and identification requirements for aerospace-grade double hexagon head bolts made from a heat‑resisting nickel‑base alloy (Inconel 718 - referenced as NI‑P100HT / NI‑PH2601). The standard covers uncoated, close‑tolerance bolts with MJ threads and medium thread length, intended for aerospace fastening systems where components are mainly stressed in shearing. The parts are classified 1 275 MPa / 650 °C and have a maximum test temperature of 650 °C.

Key topics and requirements

  • Configuration & dimensions: Exact bolt geometry, head and shank profiles, run‑out and thread forms are specified by Figure 1 and Tables 1–2 in the standard (nominal diameter codes, lengths and masses).
  • Threads: MJ threads (Aerospace MJ series) with lead and run‑out per ISO 3353‑1; pitch/major diameter tolerances follow ISO 5855 parts 1 and 2.
  • Material: Heat‑resisting nickel‑base alloy (Inconel 718), referenced via EN 2952 for bar and alloy specification.
  • Surface treatment: Bolts are uncoated - no surface plating specified.
  • Mechanical classification: Designated Class 1 275 MPa / 650 °C, appropriate for high‑strength, high‑temperature applications.
  • Designation & marking: Prescribed designation format (example: Bolt EN 3327 - 080 - 050) and marking per EN 2424:2008 (Style A).
  • Conformance: Technical specification cross‑references EN 2583 and related aerospace and ISO standards for thread and drive forms.

Applications and users

  • Primary use: Aerospace fastening systems where fasteners are primarily loaded in shear and must retain strength at elevated temperatures (up to 650 °C).
  • Typical users:
    • Aerospace design and structural engineers specifying high‑temperature fasteners
    • Fastener manufacturers producing close‑tolerance Inconel 718 bolts
    • Procurement teams and OEMs ensuring component compliance with EN standards
    • Quality, inspection and maintenance teams verifying marking, dimensions and material traceability
  • Industries: Aircraft engines, high‑temperature airframe zones, and other aerospace assemblies requiring corrosion‑resistant, heat‑resistant, high‑strength bolts.

Related standards

  • EN 2583 - Bolts, MJ threads, in nickel alloy (technical specification)
  • EN 2424 - Marking of aerospace products
  • EN 2952 - Heat resisting alloy NI‑PH2601 (bar for forged fasteners)
  • ISO 3353‑1, ISO 4095, ISO 5855‑1/2 - Thread and drive form standards

Keywords: EN 3327:2008, double hexagon head bolts, Inconel 718, NI‑P100HT, NI‑PH2601, MJ thread, close tolerance bolts, aerospace fasteners, 650 °C, 1275 MPa.

Frequently Asked Questions

SIST EN 3327:2008 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Bolts, double hexagon head, close tolerance, medium thread length, in heat resisting nickel base alloy NI-P100HT (Inconel 718), uncoated - Classification: 1 275 MPa/650 °C". This standard covers: This standard specifies the dimensions of uncoated double hexagon head bolts, close tolerance, with MJ-thread, medium thread length, in heat resisting nickel base alloy NI-P100HT for aerospace applications. Maximum test temperature of the parts is 650 °C. These bolts are to be used in aerospace fastening systems mainly stressed in shearing force..

This standard specifies the dimensions of uncoated double hexagon head bolts, close tolerance, with MJ-thread, medium thread length, in heat resisting nickel base alloy NI-P100HT for aerospace applications. Maximum test temperature of the parts is 650 °C. These bolts are to be used in aerospace fastening systems mainly stressed in shearing force..

SIST EN 3327:2008 is classified under the following ICS (International Classification for Standards) categories: 49.030.20 - Bolts, screws, studs. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 3327:2008 has the following relationships with other standards: It is inter standard links to oSIST prEN 3327:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 3327:2008 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-2008
Aeronavtika - Sorniki, dvojna šestroba glava, ozka toleranca, srednja navojna
dolžina, iz toplotnoodporne zlitine na nikljevi osnovi NI-P100HT (Inconel 718), brez
prevleke - Klasifikacija: 1 275 MPa/650 °C
Aerospace series - Bolts, double hexagon head, close tolerance, medium thread length,
in heat resisting nickel base alloy NI-P100HT (Inconel 718), uncoated - Classification: 1
275 MPa/650 °C
Luft- und Raumfahrt - Zwölftkant-Passschrauben, mittlere Gewindelänge, aus
hochwarmfester Nickelbasislegierung NI-P100HT (Inconel 718), blank - Klasse: 1 275
MPa/650 °C
Série aérospatiale - Vis de précision à tête bihexagonale à filetage moyen en alliage
résistant à chaud à base de nickel NI-P100HT (Inconel 718), non revêtu - Classification:
1 275 MPa/650 °C
Ta slovenski standard je istoveten z: EN 3327:2008
ICS:
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 3327
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2008
ICS 49.030.20
English Version
Aerospace series - Bolts, double hexagon head, close tolerance,
medium thread length, in heat resisting nickel base alloy NI-
P100HT (Inconel 718), uncoated - Classification: 1 275 MPa/650
°C
Série aérospatiale - Vis de précision à tête bihexagonale à Luft- und Raumfahrt - Zwölftkant-Passschrauben, mittlere
filetage moyen en alliage résistant à chaud à base de
Gewindelänge, aus hochwarmfester Nickelbasislegierung
nickel NI-P100HT (Inconel 718), non revêtu - Classification: NI-P100HT (Inconel 718), blank - Klasse: 1 275 MPa/650
1 275 MPa/650 °C °C
This European Standard was approved by CEN on 3 November 2007.

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: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3327:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope.4
2 Normative references.4
3 Required characteristics.4
3.1 Configuration, dimensions, tolerances, masses.4
3.2 Material.4
3.3 Surface treatment.4
3.4 Thread surface.4
4 Designation.9
5 Marking.9
6 Technical specification.9

Figures
Figure 1 — Configuration. 5

Tables
Table 1 — Dimensions. 6
Table 2 — Lengths and masses . 7

Foreword
This document (EN 3327:2008) has been prepared by the Aerospace and Defence Industries Association of
Europe - Standardization (ASD-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 ASD,
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 December 2008, and conflicting national standards shall be withdrawn
at the latest by December 2008.
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, 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 the United Kingdom.
1 Scope
This standard specifies the dimensions of uncoated double hexagon head bolts, close tolerance, with MJ-
thread, medium thread length, in heat resisting nickel base alloy NI-PH2601 for aerospace applications.
Maximum test temperature of the parts is 650 °C.
These bolts are to be used in aerospace fastening systems mainly stressed in shearing force.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 2424:2008, Aerospace series — Marking of aerospace products
EN 2583, Aerospace series — Bolts, MJ threads, in heat resisting nickel base alloy NI-PH2601 (Inconel 718)
— Classification: 1 275 MPa (at ambient temperature)/650 °C — Technical specification
EN 2952, Aerospace series — Heat resisting alloy NI-PH2601 — Solution treated and cold worked — Bar for
forged fasteners D ≤ 50 mm, 1 270 MPa ≤ R ≤ 1550 MPa
m
ISO 3353-1, Aerospace — Lead and runout threads — Part 1: Rolled external threads
ISO 4095, Aerospace — Bihexagonal drives — Wrenching configuration — Metric series
ISO 5855-1, Aerospace — MJ threads — Part 1: General requirements
ISO 5855-2, Aerospace — MJ threads — Part 2: Limit dimensions for
...

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