Aerospace series - Bolts, T-head, close tolerance medium thread length in heat resisting steel FE-PM1708 (FV535), uncoated - Classification: 1 000 MPa/550 °C

This standard specifies the dimensions of uncoated T-head bolts, close tolerance, with MJ-thread, medium thread length, in heat resisting steel FE-PM1708 for aerospace applications.
Maximum test temperature of the parts is 550 °C.
These bolts are to be used in aerospace fastening systems mainly stressed in shearing force.

Luft- und Raumfahrt - T-Kopf-Passschrauben mittlere Gewindelänge, aus hochwarmfestem Stahl FE-PM1708 (FV535), blank - Klasse: 1 000 MPa/550 °C

Diese Norm legt die Maße von blanken T Kopf Passschrauben mit MJ Gewinde mittlerer Gewindelänge aus hochwarmfestem Stahl FE PM1708 für Anwendungen in der Luft  und Raumfahrt fest.
Die maximale Prüftemperatur der Teile beträgt 550 °C.
Diese Schrauben sind in Verbindungssystemen der Luft  und Raumfahrt anzuwenden, die hauptsächlich auf Scherkraft beansprucht werden.

Série aérospatiale - Vis de précision à tête anti-rotation T à filetage moyen en acier résistant à chaud FE-PM1708 (FV535), non revêtu - Classification : 1 000 MPa/550 °C

Aeronavtika - Sorniki, glava T, ozka toleranca, srednja navojna dolžina, iz toplotnoodpornega jekla FE-PM1708 (FV535), brez prevleke - Klasifikacija: 1 000 MPa/550 °C

General Information

Status
Published
Publication Date
11-Dec-2007
Withdrawal Date
29-Jun-2008
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 3 - Mechanical
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
30-Jun-2017
Completion Date
21-Jan-2026

Overview

EN 3301:2007 is a CEN (ASD-STAN) aerospace standard that specifies the dimensions and designation of uncoated T‑head bolts (close tolerance) with MJ‑thread, medium thread length, manufactured in heat‑resisting steel FE‑PM1708 (FV535). These fasteners are classified 1 000 MPa / 550 °C (maximum test temperature 550 °C) and are intended for aerospace fastening systems mainly stressed in shearing force. Key outputs include dimensional drawings, tolerance tables and length/mass data for series sizes.

Key topics and technical requirements

  • Bolt type: T‑head, close tolerance, medium thread length, uncoated.
  • Material and classification: Heat resisting steel FE‑PM1708 (FV535); classification 1 000 MPa / 550 °C (max test temperature 550 °C).
  • Thread: MJ‑thread form and limits per ISO 5855 (MJ threads); thread lead and runout in accordance with ISO 3353‑1 (rolled external threads).
  • Dimensions & tolerances: Detailed in Figure 1, Table 1 (diameters, head/shank dimensions) and Table 2 (lengths and masses). Masses given as kg/1 000 pieces.
  • Surface treatment: None (uncoated).
  • Marking & designation: Marking per EN 2424 (class A). Example designation format: BOLT EN3301-080-050 (standard number – nominal diameter code – length code).
  • Conformance: Technical specification cross‑references EN 3302 for additional bolt requirements and test criteria.

Applications and who uses this standard

  • Primary use: Aerospace structural and mechanical assemblies where bolts are loaded predominantly in shear and where elevated temperature resistance up to 550 °C is required.
  • Typical users:
    • Aerospace OEMs and suppliers specifying fasteners for airframe, engine mountings or hot‑structure assemblies.
    • Fastener manufacturers producing close‑tolerance T‑head bolts in FE‑PM1708 (FV535).
    • Design and structural engineers selecting bolts to meet dimensional, mechanical and temperature classification requirements.
    • Procurement, quality assurance and certification teams ensuring components comply with EN 3301:2007.
  • Benefits: Ensures interchangeability, traceable marking and consistent mechanical/thermal classification for high‑temperature aerospace fasteners.

Related standards

  • ISO 3353‑1 - Lead and runout threads (rolled external threads)
  • ISO 5855‑1 / ISO 5855‑2 - MJ threads (general requirements and limit dimensions)
  • EN 2424 - Marking of aerospace products
  • EN 3302 - Bolts in heat resisting steel FE‑PM1708 - technical specification
  • EN 4244 / EN 4245, EN 2493 - Related alloys and bar/forging stock references

Keywords: EN 3301:2007, T‑head bolts, FE‑PM1708, FV535, heat resisting steel, aerospace fasteners, MJ‑thread, close tolerance, 550 °C, 1000 MPa.

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Frequently Asked Questions

EN 3301:2007 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Bolts, T-head, close tolerance medium thread length in heat resisting steel FE-PM1708 (FV535), uncoated - Classification: 1 000 MPa/550 °C". This standard covers: This standard specifies the dimensions of uncoated T-head bolts, close tolerance, with MJ-thread, medium thread length, in heat resisting steel FE-PM1708 for aerospace applications. Maximum test temperature of the parts is 550 °C. These bolts are to be used in aerospace fastening systems mainly stressed in shearing force.

This standard specifies the dimensions of uncoated T-head bolts, close tolerance, with MJ-thread, medium thread length, in heat resisting steel FE-PM1708 for aerospace applications. Maximum test temperature of the parts is 550 °C. These bolts are to be used in aerospace fastening systems mainly stressed in shearing force.

EN 3301:2007 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.

EN 3301:2007 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-marec-2008
Aeronavtika - Sorniki, glava T, ozka toleranca, srednja navojna dolžina, iz
toplotnoodpornega jekla FE-PM1708 (FV535), brez prevleke - Klasifikacija: 1 000
MPa/550 °C
Aerospace series - Bolts, T-head, close tolerance medium thread length in heat resisting
steel FE-PM1708 (FV535), uncoated - Classification: 1 000 MPa/550 °C
Luft- und Raumfahrt - T-Kopf-Paßschauben mittlere Gewindelänge, aus
hochwarmfestem Stahl FE-PM1708 (FV535), blank - Klasse: 1 000 MPa/550 °C
Série aérospatiale - Vis de précision à tête anti-rotation T à filetage moyen en acier
résistant à chaud FE-PM1708 (FV535), non revêtu - Classification : 1 000 MPa/550 °C
Ta slovenski standard je istoveten z: EN 3301:2007
ICS:
49.030.20
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3301
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2007
ICS 49.030.20
English Version
Aerospace series - Bolts, T-head, close tolerance medium
thread length in heat resisting steel FE-PM1708 (FV535),
uncoated - Classification: 1 000 MPa/550 °C
Série aérospatiale - Vis de précision à tête anti-rotation T à Luft- und Raumfahrt - T-Kopf-Paßschauben mittlere
filetage moyen en acier résistant à chaud FE-PM1708 Gewindelänge, aus hochwarmfestem Stahl FE-PM1708
(FV535), non revêtu - Classification : 1 000 MPa/550 °C (FV535), blank - Klasse: 1 000 MPa/550 °C
This European Standard was approved by CEN on 5 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
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3301:2007: E
worldwide for CEN national Members.

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

Foreword
This document (EN 3301:2007) 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 June 2008, and conflicting national standards shall be withdrawn at
the latest by June 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 T-head bolts, close tolerance, with MJ-thread, medium
thread length, in heat resisting steel FE-PM1708 for aerospace applications.
Maximum test temperature of the parts is 550 °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.
ISO 3353-1, Aerospace — Lead and runout threads — Part 1: Rolled external threads.
ISO 5855-1, Aerospace — MJ threads — Part 1: General requirements.
ISO 5855-2, Aerospace — MJ threads — Part 2: Limit dimensions for bolts and nuts.
EN 2424, Aerospace series — Marking of aerospace products.
1) 2)
EN 2493 , Heat resisting steel FE-PM38 — 1 000 MPa ≤ R ≤ 1 140 MPa — Bars — Aerospace series.
m
EN 3302, Aerospace series — Bolts in heat resisting steel FE-PM1708 (FV535) — Classification:
3)
1 000 MPa / 550 °C — Technical specification.
EN 4244, Aerospace series — Heat
...

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