SIST EN 2809:2002
(Main)Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal across flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient temperature) / 650 °C
- Abstract
This standard specifies the characteristics of hexagonal slotted / castellated nuts, reduced height, normal across flats, in heat resisting steel, silver plated.
Classification: 900 MPa ) / 650 °C )
- Status
- Published
- Publication Date
- 31-Dec-2001
- Technical Committee
- SS SPL - Technical Board for the general field
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Jan-2002
- Due Date
- 01-Jan-2002
- Completion Date
- 01-Jan-2002
SIST EN 2809:2002 is the Slovenian standard for aerospace hexagon slotted/castellated nuts, reduced height, normal across flats, made in heat resisting steel and silver plated. It specifies the nut characteristics for the 900 MPa classification at ambient temperature and 650 °C, so designers, buyers, suppliers, and inspectors know which fastener type they are dealing with. The document covers dimensions, materials, surface treatment, marking, and the technical specification used for manufacture and acceptance.
What does SIST EN 2809:2002 specify?
SIST EN 2809:2002 specifies the characteristics of a defined aerospace nut type. It is organized into six clauses: scope, normative references, required characteristics, designation, marking, and technical specification.
Clause 3 links the product to a drawing and tables for size control, Clause 4 defines how to name the nut in orders and records, and Clause 5 defines how it is marked for identification.
What are the key requirements of SIST EN 2809:2002?
Classification and service rating - Clause 1 defines the nut as a 900 MPa / 650 °C item. In practice, this tells the user the load level and the temperature capability for the application.
Configuration, dimensions, and masses - Clause 3.1, Figure 1, and Table 1 define the nut form, size codes, thread sizes, and mass information. The dimensions follow ISO 9618 and apply after surface treatment, which matters because the finished plated part must still fit the mating bolt and assembly space.
Form and position tolerances - Clause 3.2 refers to ISO 8788. This controls the geometry of the nut so the slots, flats, and thread alignment remain suitable for aerospace assembly and locking.
Materials - Clause 3.3 refers to TR 3823. In practice, the material choice must follow the aerospace guidance for plain and slotted hexagonal nuts made from heat resisting steel.
Surface treatment - Clause 3.4 requires silver plating to EN 2786. The plating is controlled separately on external surfaces and thread flanks, and smaller sizes must have full coverage of the thread profile, which matters for corrosion protection and thread function after coating.
Designation - Clause 4 defines a designation made from a description block and an identity block, with the diameter code taken from Table 1. A code I9005 may be inserted when needed, so purchase documents can identify the exact nut unambiguously.
Marking - Clause 5 points to EN 2424 and Table 2 for product marking. The marking style depends on the diameter code, which helps receiving inspection and traceability.
Technical specification - Clause 6 makes the nuts subject to ISO 9139, with manufacturer approval handled through EN 2000. This ties the product to a procurement specification and a quality-system approval route.
What terms does SIST EN 2809:2002 define?
Classification - The strength and temperature rating used to identify the nut's intended service level.
MJ threads - The aerospace metric thread form used for these nuts.
Diameter code - The size identifier used in the designation and marking.
Split pin - The locking pin associated with the nut size in Table 1.
Silver plating - The surface treatment required by EN 2786 for the finished nut.
Marking - The product identification applied in line with EN 2424.
Who uses SIST EN 2809:2002?
SIST EN 2809:2002 is used by aerospace manufacturers, fastener suppliers, purchasing teams, quality managers, design engineers, and inspection staff. They use it to specify the nut type, check dimensions and plating, write purchase descriptions, and verify delivered parts.
What changed in SIST EN 2809:2002 from the previous edition?
SIST EN 2809:2002 is identified as the Slovenian equivalent of EN 2809:2001.
Which standards are used with SIST EN 2809:2002?
| Standard | What it contributes |
|---|---|
| ISO 5855-2 | Limit dimensions for MJ threads on bolts and nuts. |
| ISO 8788 | Tolerances of form and position for aerospace nuts. |
| ISO 9139 | Procurement specification for plain or slotted castelled nuts. |
| ISO 9618 | Dimensional basis for reduced-height slotted/castellated aerospace nuts with MJ threads. |
| EN 2000 | Approval of the quality system of manufacturers. |
| EN 2367 | Split pins in steel, used with the nut sizes in Table 1. |
| EN 2424 | Marking of aerospace products. |
| EN 2786 | Electrolytic silver plating of fasteners. |
| TR 3823 | Materials for plain and slotted hexagonal nuts. |
What does the SIST EN 2809:2002 document contain?
Figure 1 shows the nut configuration and identifies the slot form, contour options, and marking position. Table 1 gives the diameter codes, thread designations, principal dimensions, approximate masses, and split pin information.
Clause 4 provides a worked designation pattern for ordering and cataloguing the nut. Clause 5 links the product to the marking system, and Clause 6 connects the standard to procurement and manufacturer approval practice.
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
SIST EN 2809:2002 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal across flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient temperature) / 650 °C". This standard covers: This standard specifies the characteristics of hexagonal slotted / castellated nuts, reduced height, normal across flats, in heat resisting steel, silver plated. Classification: 900 MPa ) / 650 °C )
This standard specifies the characteristics of hexagonal slotted / castellated nuts, reduced height, normal across flats, in heat resisting steel, silver plated. Classification: 900 MPa ) / 650 °C )
SIST EN 2809:2002 is classified under the following ICS (International Classification for Standards) categories: 49.030.30 - Nuts. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 2809:2002 has the following relationships with other standards: It is inter standard links to SIST EN 2424:2008, SIST EN 9100:2018, SIST EN 9133:2018, SIST EN 3727:2009, SIST EN 2944:2001, SIST EN 2367:2001, SIST EN 840-6:2004+A1:2008, SIST EN 2786:2008, SIST EN 4840-101:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 2809:2002 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-januar-2002
Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal
across flats, in heat resisting steel, silver plated - Classification: 900 Mpa (at
ambient temperature) / 650 oC
Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal across
flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient
temperature) / 650 °C
Luft- und Raumfahrt - Flache Kronenmuttern mit normaler Schlüsselweite, aus
hochwarmfestem Stahl, versilbert - Klasse: 900 MPa (bei Raumtemperatur) / 650 °C
Série aérospatiale - Écrous hexagonaux a créneaux, hauteur réduite, surplats normaux,
en
acier résistant a chaud, argentés - Classification : 900 MPa (a température ambiante) /
650 °C
Ta slovenski standard je istoveten z: EN 2809:2001
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 2809
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2001
ICS 49.030.30
English version
Aerospace series - Nuts, hexagon, slotted/castellated, reduced
height, normal across flats, in heat resisting steel, silver plated -
Classification: 900 MPa (at ambient temperature)/650°C
Série aérospatiale - Ecrous hexagonaux à créneaux, Luft- und Raumfahrt - Flache Kronenmuttern mit normaler
hauteur réduite, surplats normaux, en acier résistant à Schlüsselweite, aus hochwarmfestem Stahl, versilbert -
chaud, argentés - Classification: 900 MPa (à température Klasse: 900 MPa (bei Raumtemperatur)/650°C
ambiante)/650°C
This European Standard was approved by CEN on 28 February 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, 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
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2809:2001 E
worldwide for CEN national Members.
Page 2
Foreword
This European Standard has been prepared by the European Association of Aerospace Manufacturers
(AECMA).
After inquiries 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 December 2001, and conflicting national standards shall be
withdrawn at the latest by December 2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,
Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
Spain, Sweden, Switzerland and the United Kingdom.
Page 3
1 Scope
This standard specifies the characteristics of hexagonal slotted / castellated nuts, reduced height, normal
across flats, in heat resisting steel, silver plated.
1) 2)
Classification: 900 MPa / 650 °C
2 Normative references
This European Standard incorporates by dated or undated reference provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to
this European Standard only when incorporated in it by amendment or revision. For undated references the
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