Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting base alloy, passivated - Classification: 1 550 MPa (at ambient temperature)/315 °C

This standard specifies the characteristics of bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, passivated. Classification: 1150 MPa / 315°C.

Luft- und Raumfahrt - Zwölfkant-Paßschrauben, mittlere Gewindelänge, aus hochwarmfester Nickelbasislegierung, passiviert - Klasse: 1 550 MPa (bei Raumtemperatur)/315°C

Diese Norm legt die Eigenschaften von Zwölfkant-Paßschrauben mit mittlerer Gewindelänge, aus hochwarmfester Nickelbasislegierung, passiviert, fest. Klasse: 1550 MPa / 315°C.

Série aérospatiale - Vis a tete bihexagonale large, tige normale a tolérance serrée, filetage moyen, en alliage résistant a chaud a base de nickel, passivées - Classification: 1550 MPa (a température ambiante)/315°C

La présente norme spécifie les caractéristiques des vis à tête bihexagonale large, tige normale à tolérance serrée, filetage moyen, en alliage résistant à chaud à base de nickel, passivées. Classification: 1150 MPa / 315°C.

Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting base alloy, passivated - Classification: 1 550 MPa (at ambient temperature)/315 °C

General Information

Status
Published
Publication Date
31-Dec-2000
ICS
49.030.20 - Bolts, screws, studs
Technical Committee
SS SPL - Technical Board for the general field
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jan-2001
Due Date
01-Jan-2001
Completion Date
01-Jan-2001
Ref Project
EN 2874:1996 - Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting base alloy, passivated - Classification: 1 550 MPa (at ambient temperature)/315 °C

Relations

Corrected By
SIST EN 2874:2001/AC:2001 - Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting base alloy, passivated - Classification: 1 550 MPa (at ambient temperature)/315 °C
Effective Date
22-Dec-2008

Overview

EN 2874:1996 (CEN) is an aerospace standard that specifies the characteristics of large bihexagonal head bolts with a close‑tolerance normal shank and medium length thread, manufactured from a heat‑resisting nickel‑base alloy and passivated for corrosion resistance. The document sets a mechanical classification of 1 550 MPa (at ambient temperature) / 315 °C, defining the intended strength and high‑temperature performance for these specialized fasteners. (Note: a different figure, 1150 MPa, was also referenced in the provided scope; consult the official CEN/EN text to confirm the applicable classification for procurement or design.)

Key topics and requirements

  • Bolt geometry and form: large bihexagonal head, normal shank with close tolerances, medium thread length - useful for predictable clamping and torque control.
  • Material: heat‑resisting nickel‑base alloy specified for elevated‑temperature service and oxidation resistance.
  • Surface condition: passivation requirements to improve corrosion resistance and compatibility with aerospace coatings.
  • Mechanical classification: defined tensile/strength class expressed in MPa and verified at ambient and elevated temperature (315 °C) to ensure performance in hot sections.
  • Dimensional and tolerance control: close‑tolerance shank and thread characteristics for tight fit applications and consistent assembly behavior.
  • Quality and traceability: expectation of manufacturer documentation, material certification, and batch traceability consistent with aerospace procurement practices.
  • Intended environmental/service conditions: suitability for high‑temperature and corrosive environments typical of aerospace propulsion and hot structure areas.

Applications

EN 2874 bolts are intended for high‑temperature aerospace applications where high strength and thermal resistance are critical, including:

  • Turbine engine assemblies and hot‑section components
  • Exhaust systems, afterburners and high‑temperature ducting
  • Airframe areas exposed to elevated temperatures or corrosive conditions
  • Critical joints requiring precise clamp load and close‑fit fasteners

Keywords: EN 2874, aerospace bolts, bihexagonal head, heat resisting nickel base alloy, passivated bolts, high‑temperature fasteners, 1550 MPa, 315 °C, close tolerance.

Who uses this standard

  • Aerospace design and structural engineers specifying fasteners for hot‑section hardware
  • Fastener manufacturers producing nickel‑base alloy bolts to aerospace tolerances
  • Procurement and quality managers verifying material and mechanical compliance
  • Maintenance, repair and overhaul (MRO) organizations replacing critical high‑temperature fasteners
  • Certification and conformity assessment bodies

Related standards

  • Other EN and ISO standards for aerospace fasteners, threads and material testing (consult CEN/ISO catalogs for specific references).

Always refer to the official EN 2874 document and the latest national adoption (e.g., SIST EN) for exact requirements, testing methods and procurement language.

Frequently Asked Questions

SIST EN 2874:2001 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting base alloy, passivated - Classification: 1 550 MPa (at ambient temperature)/315 °C". This standard covers: This standard specifies the characteristics of bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, passivated. Classification: 1150 MPa / 315°C.

This standard specifies the characteristics of bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, passivated. Classification: 1150 MPa / 315°C.

SIST EN 2874:2001 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 2874:2001 has the following relationships with other standards: It is inter standard links to SIST EN 2874:2001/AC:2001. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 2874:2001 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)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting base alloy, passivated - Classification: 1 550 MPa (at ambient temperature)/315 °CLuft- und Raumfahrt - Zwölfkant-Paßschrauben, mittlere Gewindelänge, aus hochwarmfester Nickelbasislegierung, passiviert - Klasse: 1 550 MPa (bei Raumtemperatur)/315°CSérie aérospatiale - Vis a tete bihexagonale large, tige normale a tolérance serrée, filetage moyen, en alliage résistant a chaud a base de nicke
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