kSIST FprEN 3613:2026

Aerospace series - Bolts, normal hexagonal head, relieved shank, long thread, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), silver plated - Classification: 1 275 MPa/650 °C

This document specifies the characteristics of bolts normal hexagonal head with relieved shank and long thread in heat resisting nickel base alloy NI-PH2601 (Inconel 718), for aerospace applications.
Classification: 1 275 MPa /650 °C

Luft‑ und Raumfahrt - Sechskantschrauben, Dünnschaft, langes Gewinde, aus hochwarmfester Nickelbasislegierung NI‑PH2601 (Inconel 718), versilbert - Klasse: 1 275 MPa/650 °C

Dieses Dokument legt die Eigenschaften von üblichen Sechskantschrauben mit Dünnschaft und langem Gewinde aus hochwarmfester Nickelbasislegierung NI PH2601 (Inconel 718) für die Anwendung in der Luft- und Raumfahrt fest.
Klasse: 1 275 MPa /650 °C

Série aérospatiale - Vis à tête hexagonale normale, fût dégagé, filetage long, en alliage base nickel, résistant à chaud NI-PH2601 (Inconel 718), argentées - Classification : 1 275 MPa/650 °C

Le présent document spécifie les caractéristiques des vis à tête hexagonale normale, tige dégagée, filetage long, en alliage résistant à chaud base nickel NI-PH2601 (Inconel 718), pour les applications aérospatiales.
Classification : 1 275 MPa /650 °C.

Aeronavtika - Sorniki, normalna šestroba glava, tanko steblo, dolg navoj, iz toplotnoodporne zlitine na nikljevi osnovi NI-PH2601 (Inconel 718), posrebreni - Klasifikacija: 1 275 MPa/650 °C

General Information

• Status: Not Published
• Public Enquiry End Date: 09-Sep-2025
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 02-Jun-2026
• Due Date: 21-Jul-2026
• Ref Project: FprEN 3613 - Aerospace series - Bolts, normal hexagonal head, relieved shank, long thread, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), silver plated - Classification: 1 275 MPa/650 °C

Relations

• Revises: SIST EN 3613:2009 - Aerospace series - Bolts, normal hexagonal head, relieved shank, long thread, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), silver plated - Classification: 1275 MPa/650 °C
• Effective Date: 12-Feb-2025

Overview

kSIST FprEN 3613:2026 specifies the requirements for bolts with a normal hexagonal head, relieved shank, and long thread in heat-resisting nickel base alloy NI-PH2601 (Inconel 718), featuring a silver plated surface. These aerospace-standard bolts are classified for use at a tensile strength of 1,275 MPa and operational temperatures up to 650 °C. Developed by SIST (Slovenian Institute for Standardization), this standard addresses the high-performance needs of the aerospace sector, ensuring reliability and durability in critical environments.

Key Topics

• Material Specification: Bolts manufactured from nickel base alloy NI-PH2601 (Inconel 718), as specified in SAE AMS5662, recognized for its corrosion and heat resistance.
• Design Features:
  • Normal hexagonal head for standard tool compatibility
  • Relieved shank and long thread for optimized mechanical performance
  • Multiple diameter and length codes for broad application needs
• Surface Treatment: Electrolytic silver plating (according to EN 2786, category A) enhances corrosion resistance and offers excellent anti-galling properties, critical for aerospace fasteners.
• Mechanical Classification: Minimum tensile strength of 1,275 MPa at ambient temperature, suitable for environments with temperatures up to 650 °C.
• Dimensional Accuracy: Detailed parameters on configuration, tolerances, and surface roughness after plating, ensuring consistency and interchangeability in assembly.

Applications

This standard is particularly relevant in aerospace engineering and high-performance industries where reliable fastener performance under extreme thermal and mechanical stress is paramount:

• Aircraft and spacecraft assembly: Used in engine assemblies, airframe structures, and subsystems exposed to high temperatures and stresses.
• Turbine components: Suitable for joining parts in high-temperature sections of turbines.
• Defense and military aviation: Ensures component integrity in critical and safety-relevant areas.
• Other industries: Can be applied in chemical processing, power generation, or automotive sectors where similar environmental stresses exist.

Adhering to kSIST FprEN 3613:2026 ensures that fastener selection meets rigorous safety, performance, and maintenance requirements, helping organizations comply with international aerospace standards and improve overall system reliability.

Related Standards

Users of kSIST FprEN 3613:2026 will benefit from familiarity with these related standards:

• EN 2583: Aerospace series - Bolts, MJ threads, in NI-PH2601 (Inconel 718) - Technical specification
• EN 2786: Aerospace series - Electrolytic silver plating of fasteners
• EN 2424: Aerospace series - Marking of aerospace products
• ISO 3353-1: Aerospace - Lead and runout threads - Part 1: Rolled external threads
• ISO 5855-1/ISO 5855-2: Aerospace - MJ threads - General requirements and limit dimensions
• SAE AMS5662: Nickel alloy specification for Inconel 718

These references provide critical supplementary information on thread standards, marking guidelines, and coating practices, facilitating comprehensive compliance and optimal fastener selection for aerospace and other high-demand applications.

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Keywords: kSIST FprEN 3613:2026, aerospace bolts, NI-PH2601, Inconel 718, heat resisting alloy, silver plated bolts, high temperature fasteners, aerospace series standards, SIST, 1275 MPa classification, 650°C bolts, standardization, hexagonal head bolts, relieved shank, long thread fasteners.

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 3613:2025
01-september-2025
Aeronavtika - Sorniki, normalna šestroba glava, tanko steblo, dolg navoj, iz
toplotnoodporne zlitine na nikljevi osnovi NI-PH2601 (Inconel 718), posrebreni -
Klasifikacija: 1 275 MPa/650 °C
Aerospace series - Bolts, normal hexagonal head, relieved shank, long thread, in heat
resisting nickel base alloy NI-PH2601 (Inconel 718), silver plated - Classification: 1 275
MPa/650 °C
Luft‑ und Raumfahrt - Sechskantschrauben, Dünnschaft, langes Gewinde, aus
hochwarmfester Nickelbasislegierung NI‑PH2601 (Inconel 718), versilbert - Klasse: 1
275 MPa/650 °C
Série aérospatiale - Vis à tête hexagonale normale, fût dégagé, filetage long, en alliage
base nickel, résistant à chaud NI-PH2601 (Inconel 718), argentées - Classification : 1
275 MPa/650 °C
Ta slovenski standard je istoveten z: prEN 3613
ICS:
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
oSIST prEN 3613:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 3613:2025
oSIST prEN 3613:2025
DRAFT
EUROPEAN STANDARD
prEN 3613
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2025
ICS 49.030.20 Will supersede EN 3613:2009
English Version
Aerospace series - Bolts, normal hexagonal head, relieved
shank, long thread, in heat resisting nickel base alloy NI-
PH2601 (Inconel 718), silver plated - Classification: 1 275
MPa/650 °C
Série aérospatiale - Vis à tête hexagonale normale, fût Luft- und Raumfahrt - Sechskantschrauben,
dégagé, filetage long, en alliage base nickel, résistant à Dünnschaft, langes Gewinde, aus hochwarmfester
chaud NI-PH2601 (Inconel 718), argentées - Nickelbasislegierung NI-PH2601 (Inconel 718),
Classification : 1 275 MPa/650 °C versilbert - Klasse: 1 275 MPa/650 °C
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 3613:2025 E
worldwide for CEN national Members.

oSIST prEN 3613:2025
prEN 3613:2025 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 4
4.1 Configuration, dimensions, tolerances, masses . 4
4.2 Surface roughness . 4
4.3 Material . 5
4.4 Surface coating . 5
5 Designation . 8
6 Marking . 8
7 Technical specification . 8
oSIST prEN 3613:2025
prEN 3613:2025 (E)
European foreword
This document (prEN 3613:2025) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 3613:2009.
This document includes the following significant technical changes with respect to EN 3613:2009:
— 4.2 “Material”: material standard SAE AMS5662 added;
— 4.4 “Thread surface” removed.
oSIST prEN 3613:2025
prEN 3613:2025 (E)
1 Scope
This document specifies the characteristics of bolts normal hexagonal head with relieved shank and long
thread in heat resisting nickel base alloy NI-PH2601 (Inconel 718), for aerospace applications.
1 2
Classification: 1 275 MPa /650 °C
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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, Aerospace series — Marking of aerospace products
EN 2583, Aerospace series — Bolts, MJ threads, in heat resisting nickel base
...