EN 3043:2008

Aerospace series - Fasteners, externally threaded, in heat resisting steel FE PA92HT (A286) - Classification: 900 MPa/650 °C, manufacturing method optional - Technical specification

This standard specifies the technical and quality assurance requirements for externally threaded fasteners in material FE-PA92HT (A286) of tensile strength class 900 MPa at room temperature, maximum test temperature of material 650 °C.
The externally threaded fasteners specified here may be manufactured by machining from bar or by forging at the manufacturer's option, if forged there is no requirement for control of grain flow.
Primarily for aerospace applications it is applicable to such externally threaded fasteners when referenced on the product standard or drawing.

Luft- und Raumfahrt - Verbindungselemente mit Außengewinde aus hochwarmfestem Stahl FE-PA92HT (A286) - Klasse: 900 MPa/650 °C, Herstellverfahren nach Wahl - Technische Lieferbedingungen

Série aérospatiale - Eléments de fixation, filetés, en acier résistant à chaud FE-PA92HT (A286) - Classification: 900 MPa/650 °C - Mode de fabrication non imposé - Spécification technique

Aeronavtika - Vezni elementi z zunanjim navojem iz toplotnoodpornega jekla FE PA92HT (A286) - Klasifikacija: 900 MPa/650 °C, metoda izdelave po izbiri - Tehnična specifikacija

General Information

• Status: Withdrawn
• Publication Date: 27-May-2008
• Withdrawal Date: 30-Dec-2025
• ICS: 49.030.01 - Fasteners in general
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3 - Mechanical
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 28-May-2008
• Completion Date: 28-May-2008
• Ref Project: SIST EN 3043:2008 - Aerospace series - Fasteners, externally threaded, in heat resisting steel FE PA92HT (A286) - Classification: 900 MPa/650 °C, manufacturing method optional - Technical specification

Relations

• Replaced By: EN 3043:2025 - Aerospace series - Fasteners, externally threaded, in heat resisting steel FE-PA92HT (A286) - Classification: 900 MPa/650 °C, manufacturing method optional - Technical specification
• Effective Date: 05-Jun-2019

Overview

EN 3043:2008 is a CEN aerospace technical specification for externally threaded fasteners manufactured from heat‑resisting steel FE‑PA92HT (A286). It sets material, mechanical and quality assurance requirements for parts in the tensile strength class 900 MPa at room temperature, with a maximum material test temperature of 650 °C. The standard applies primarily to aerospace applications when referenced on the product standard or drawing and permits either machining from bar or forging (manufacturer’s choice) as the manufacturing method.

Key topics and technical requirements

• Material and classification
  • Fasteners must be produced from FE‑PA92HT (A286) meeting the specified 900 MPa class and 650 °C test limit.
  • Materials supplied should conform to related material standards (e.g., EN 2398, EN 2399, EN 3639).
• Manufacturing methods
  • Parts may be machined from bar or forged; if forged, no grain‑flow control is required.
  • Forging temperature limit: ≤ 1 150 °C with air cooling.
• Heat treatment
  • Solution treatment example: 980 °C ± 15 °C for 1 h, quench in oil or water.
  • Precipitation (age) treatment: 710–730 °C, hold ≥ 16 h (± allowed tolerance), then air cool.
• Surface and finishing
  • Removal of scale/contamination by approved abrasive blasting and grinding of shank and bearing surfaces where necessary.
  • Optional cold fillet rolling to remove machining evidence (with distortion limits described).
• Inspection, testing and sampling
  • Acceptance tests and sampling plans are defined (see tables for production acceptance, tensile loads, defect classification).
  • Non‑destructive testing (e.g., penetrant inspection) and dimensional/thread gauging are required where applicable.
• Quality assurance
  • Manufacturer responsibility for inspection and test reports; quality system certification per ISO 9001 and EN 3039 is referenced.

Applications and users

• Intended for aerospace and high‑temperature fastening applications where A286 (FE‑PA92HT) fasteners are specified on drawings or product standards.
• Typical users:
  • Aerospace fastener manufacturers and forgers
  • Design and stress engineers specifying high‑temperature fasteners
  • Quality, inspection and procurement teams enforcing production acceptance and certification
  • Supply chain stakeholders ensuring conformity to CEN requirements

Related standards

• EN 2398, EN 2399, EN 3639 (material/bar specifications)
• EN 3039 (quality systems for propulsion standard parts)
• ISO 2859‑1, ISO 3452, ISO 468, ISO 7961, ISO 9001 (sampling, NDT, surface roughness, test methods, quality systems)

Keywords: EN 3043:2008, A286 fasteners, FE‑PA92HT, aerospace fasteners, 900 MPa, 650 °C, heat resisting steel, CEN standard, heat treatment, quality assurance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2008
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Aerospace series - Fasteners, externally threaded, in heat resisting steel FE PA92HT
(A286) - Classification: 900 MPa/650 °C, manufacturing method optional - Technical
specification
Luft- und Raumfahrt - Verbindungselemente mit Außengewinde aus hochwarmfestem
Stahl FE-PA92HT (A286) - Klasse: 900 MPa/650 °C, Herstellverfahren nach Wahl -
Technische Lieferbedingungen
Série aérospatiale - Eléments de fixation, filetés, en acier résistant à chaud FE-PA92HT
(A286) - Classification: 900 MPa/650 °C - Mode de fabrication non imposé - Spécification
technique
Ta slovenski standard je istoveten z: EN 3043:2008
ICS:
49.030.01 Vezni elementi na splošno Fasteners in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3043
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2008
ICS 49.030.01
English Version
Aerospace series - Fasteners, externally threaded, in heat
resisting steel FE PA92HT (A286) - Classification: 900 MPa/650
°C, manufacturing method optional - Technical specification
Série aérospatiale - Eléments de fixation, filetés, en acier Luft- und Raumfahrt - Verbindungselemente mit
résistant à chaud FE-PA92HT (A286) - Classification: 900 Außengewinde aus hochwarmfestem Stahl FE-PA92HT
MPa/650 °C - Mode de fabrication non imposé - (A286) - Klasse: 900 MPa/650 °C, Herstellverfahren nach
Spécification technique Wahl - Technische Lieferbedingungen
This European Standard was approved by CEN on 12 December 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 3043:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .5
4 Certification and quality assurance.6
4.1 Acceptance.6
4.2 Quality system certification.7
4.3 Responsibility for inspection and tests .7
4.4 Inspection and test report.7
5 Technical requirements and test method .7
Bibliography .22

Figures
Figure 1 — Distortion in fillet area (see 5.3.5). 18
Figure 2 — Non-permissible laps, seams and surface irregularities (see 5.5.3.2). 19
Figure 3 — Permissible laps, seams and surface irregularities (see 5.5.3.2). 20
Figure 4 — Crest lap imperfections (see 5.5.3.2). 20
Figure 5 — Metallurgical specimens (see 5.5.1) . 21

Tables
Table 1 — Technical requirements and test method . 7
Table 2 — Summary of test – Production acceptance. 14
Table 3 — Minimum tensile loads . 14
Table 4 — Classification of defects . 15
Table 5 — Sampling plans for visual inspections and dimensional characteristics. 16
Table 6 — Sampling plans for the inspection of mechanical and metallurgical characteristics . 16
Table 7 — Thread discontinuities – Maximum depth of permissable faults (see 5.5.7.2) . 17
Table 8 — Variable sampling for tensile test (alternative method). 17

Foreword
This document (EN 3043:2008) 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 November 2008, and conflicting national standards shall be withdrawn
at the latest by November 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 technical and quality assurance requirements for externally threaded fasteners in
material FE-PA92HT (A286) of tensile strength class 900 MPa at room temperature, maximum test
temperature of material 650 °C.
The externally threaded fasteners specified here may be manufactured by machining from bar or by forging at
the manufacturer's option, if forged there is no requirement for control of grain flow.
Primarily for aerospace applications it is applicable to such externally threaded fasteners when referenced on
the product standard or drawing.
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 2398, Heat resisting steel FE-PA92-HT — R ≥ 900 MPa — Bars for machined bolts D ≤ 25 mm —
m
1)
Aerospace Series
EN 2399, Heat resisting steel FE-PA92-HT — R ≥ 900 MPa — Bars for forged bolts D ≤ 25 mm —
m
1)
Aerospace Series
EN 3039, Aerospace series — Quality systems — Supplementary requirements to ISO 9002 applicable for the
manufacture/processing of material for propulsion standard parts
EN 3639, Heat resisting alloy FE-PA2601 — Softened and cold worked — Wire for forged fasteners —
1)
D ≤ 15 mm, 900 MPa ≤ R ≤ 1 100 MPa
m
ISO 468, Surface roughness; Parameters, their values and general rules for specifying requirements
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3452, Non destructive testing — Penetrant inspection — General principles
ISO 3534-1, Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in
probability
ISO 3534-2, Statistics — Vocabulary and symbols — Part 2: Applied statistics
ISO 7961, Aerospace — Bolts — Test methods
ISO 9001, Quality management systems — Requirements

1) Published as AECMA prestandard at the date of publication of this standard.
3 Terms and definitions
3.1
production batch
quantity of finished parts fabricated by the same process from a single material cast (single heat of alloy),
having the same basic part number and diameter, heat treated together to the same specified condition and
produced as one continues run
3.2
inspection lot
consists of parts from a single production batch of the same part number which completely defines the part

3.3 Discontinuities
3.3.1
crack
rupture in the material which may extend in any direction and which may be intercrystalline or transcrystallyne
in character
3.3.2
seam
longitudinal surface defect in the form of an unwelded open fold in the material
3.3.3
lap
surface defect caused by folding over metal fins or sharp corners and then rolling or forging them into the
surface
3.3.4
inclusion
non-metallic particles originating from the material making process. They may exist as discrete particles or
strings of particles extending longitudinally
3.4
test temperature
ambient temperature, unless otherwise specified
3.5
2)
simple random sampling
the taking of n items from a population of N items in such a way that all possible combinations of n items have
the same probability of being chosen
3.6
2)
critical defect
a defect that according to judgement and experience, is likely to result in hazardous or unsafe conditions for
individuals using, maintaining, or depending upon the considered product, or that is likely to prevent
performance of the function of a major end item
3.7
2)
major defect
a defect other than critical, that is likely to result in a failure or to reduce materially the usability of the
considered product for its intended purpose

2) Definitions taken in ISO 3534-1:2006 and ISO 3534-2:2006.
3.8
2)
minor defect
a defect that is not likely to reduce materially the usability of the considered product for its intended purpose,
or that is a departure from established specification having little bearing on the effective use or operation of
this product
3.9
2)
sampling plan
a plan according to which one or more samples are taken in order to obtain information and possibly to reach
a decision
3.10
2)
limiting quality LQ
in a sampling plan, a quality level which corresponds to a specified and relatively low probability of acceptance
— in this case 10 % probability of acceptance. It is the limiting lot quality characteristic that a lot of this quality
would occur
When expressed as a per cent defective, it may be referred to as a lot tolerance per cent defective
3.11
2)
acceptable quality level
a quality level which in a sampling plan corresponds to a specified but relatively high probability of acceptance
It is the maximum per cent defective (or the maximum number of defects per hundred units) that, for purposes
of sampling inspection, can be considered satisfactory as a process average
3.12
finished part
a part ready for use, inclusive of any possible treatments and/or surface coatings, as specified in the
dimensional standard or drawing
4 Certification and quality assurance
The allocation of tests corresponding to the requirements of this standard is as follows.
4.1 Acceptance
4.1.1 Purpose
The purpose of acceptance tests is to check, as simply as possible, by a method representative of actual use
conditions, with the uncertainty inherant to statistical sampling, that the bolts constituting the batch satisfy the
requirements of this standard.
4.1.2 Conditions
Acceptance tests are summarised in Table 2. They shall be performed on each batch. Table 1 specifies the
test method and sampling plan to be used for each test. Bolts from the batch to be tested shall be selected by
simple random sampling.
Each bolt may be submitted to several tests.
The bolts to be subjected to destructive tests may be those on which non-destructive tests have been
performed.
4.2 Quality system certification
4.2.1 Purpose
The purpose of quality system certification is to ensure that the manufacturer has demonstrated the
acceptability of his quality system and his ability for continuing production of parts according to this standard,
to the required level of quality.
4.2.2 Requirements and procedure
The requirements and procedures for quality system certification shall be according to the requirements of
ISO 9001 and EN 3039.
4.3 Responsibility for inspection and tests
The manufacturer is responsible for the performance of all inspection and test requirements as specified
herein. Each manufacturer will use their own or exceptionally, any other facilities approved in accordance with
4.2 for the implementation of these inspection and test requirements.
4.4 Inspection and test report
A test report showing actual numerical values shall be provided at the purchaser's option as part of the terms
of the purchase order.
5 Technical requirements and test method
Table 1 — Technical requirements and test method
A = Production acceptance requirements (4.1).
Inspection and Sample
A
Clause Characteristic Technical requirement
test method size
5.1 Material Material FE-PA92-HT As stated in the material
according to specification specification.
EN 2398, EN 2399 or
EN 3639 supplied by an
approved source: shall be
used for the manufacture of
parts to this standard.
5.2 Dimensions;  A Tables 4
tolerances of and 5
form and
position;
threads and
quality
5.2.1 Dimensions The dimensions of the All dimensions shall be
finished parts shall conform controlled by an approved
to the product standard or system of gauging.
definition document.
5.2.2 Tolerances of Tolerances of form and Tolerances of form and
form and position shall conform to the position shall be controlled
position product standard or definition by an approved system of
document. gauging.
Table 1 (continued)
A = Production acceptance requirements (4.1).
Inspection and Sample
Clause Characteristic Technical requirement A
test method size
5.2.3 Threads Threads shall conform to the Threads shall be gauged by
product standard or definition an approved system of
document. gauging.
5.3 Manufacturing Parts may be manufactured
by machining from material
EN 2398 or by forging from
material EN 2399 or
EN XXXX.
5.3.1 Machined from Parts manufactured from
bar parts material in the softened, cold
worked and solution treated
condition shall be semi-finish
machined and then precipi-
tation heat treated per
5.3.3.2 prior to final machi-
ning, thread rolling (and fillet
rolling if specified on the
product standard). Parts
manufactured from material
in the softened, cold worked,
solution treated and precipi-
tation treated condition shall
be finished, machined,
thread rolled etc. without
further heat treatment.
5.3.2 Forged parts Forged parts may be formed
by hot or cold forging. If hot
forged the forging
temperature shall not exceed
1 150 °C and shall be air
cooled. The heating equip-
ment for forging shall be of a
type which ensures a
consistent temperature
throughout the batch.
The forged blanks to be
solution treated
...