SIST EN 3013:2001

Aerospace series - Nuts, bihexagonal, self-locking, in heat resisting nickel base alloy NI-P101HT (Waspaloy), silver plated - Classification: 1 210 MPa (at ambient temperature) / 730 °C

This standard specifies the characteristics of self-locking bihexagonal nuts in NI-P101HT, silver plated, for aerospace applications. Classification: 1 210 MPa/730 °C

Luft- und Raumfahrt - Zwölfkantmuttern, selbstsichernd, aus hochwarmfester Nickelbasislegierung NI-P101HT (Waspaloy), versilbert - Klasse: 1 210 MPa (bei Raumtemperatur) / 730 °C

Diese Norm legt die Eigenschaften von selbstsichernden Zwölfkantmuttern aus NI-P101HT, versilbert, zur Verwendung in der Luft- und Raumfahrt fest. Klasse: 1 210 MPa / 730 °C

Série aérospatiale - Ecrous bihexagonaux, a freinage interne, en alliage résistant a chaud a base de nickel NI-P101HT (Waspaloy), argentés - Classification: 1 210 MPa (a température ambiante) / 730 °C

La présente norme spécifie les caractéristiques des écrous bihexagonaux, à freinage interne, en NI-P101HT, argentés, pour les applications aérospatiales. Classification: 1 210 MPa / 730 °C

Aerospace series - Nuts, bihexagonal, self-locking, in heat resisting nickel base alloy NI-P101HT (Waspaloy), silver plated - Classification: 1 210 MPa (at ambient temperature) / 730°C

General Information

• Status: Published
• Publication Date: 31-Dec-2000
• ICS: 49.030.30 - Nuts
• 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 3013:1995 - Aerospace series - Nuts, bihexagonal, self-locking, in heat resisting nickel base alloy NI-P101HT (Waspaloy), silver plated - Classification: 1 210 MPa (at ambient temperature) / 730 °C

Overview

SIST EN 3013:2001 defines the requirements and characteristics for aerospace nuts that are bihexagonal, self-locking, and manufactured from the heat-resisting nickel base alloy NI-P101HT (Waspaloy), with a silver-plated finish. These nuts are designed for high-performance aerospace applications, classified to withstand 1 210 MPa at ambient temperature and maintain integrity up to 730 °C. Developed by the Slovenski inštitut za standardizacijo (SIST) in line with European standards, this specification is pivotal for ensuring reliable fastening solutions in demanding aerospace environments.

Key Topics

• Bihexagonal Self-locking Nuts: The standard focuses on bihexagonal (twelve-point) nuts, which facilitate higher torque application and improved fit in tight spaces, a significant advantage in aerospace assemblies.
• High Temperature Performance: The nuts covered are made from NI-P101HT (Waspaloy), a heat-resisting nickel base alloy, ensuring strength and performance in environments up to 730 °C.
• Corrosion and Galling Resistance: Silver plating enhances the nuts’ corrosion resistance and reduces the risk of galling, making them suitable for critical, high-temperature applications.
• Mechanical Classification: Rated to withstand stresses up to 1 210 MPa at ambient temperature, these aerospace nuts meet rigorous strength and safety requirements.

Applications

SIST EN 3013:2001 plays a crucial role for manufacturers, engineers, and maintenance teams involved in the aerospace sector. Typical application areas include:

• Aerospace Engines: Used in jet engine assemblies where extreme heat and mechanical loads are commonplace.
• Aircraft Structural Components: Provide secure, self-locking fastening for airframes and critical structures exposed to fluctuating thermal and mechanical stress.
• Turbine and Exhaust Systems: Well-suited for high-temperature zones where material stability is vital for safety and performance.
• Maintenance and Repair: Ensures compatibility and standardization of replacement parts, streamlining MRO (Maintenance, Repair, and Overhaul) processes.

Adopting nuts conforming to SIST EN 3013:2001 boosts both safety and efficiency, minimizing the risk of fastener failure under demanding conditions.

Related Standards

For comprehensive compliance and integration, the following standards may be relevant when working with or specifying aerospace fasteners:

• EN 3013:1995: The European base document that SIST EN 3013:2001 aligns with, detailing equivalent requirements for self-locking bihexagonal nuts in nickel base alloy.
• EN 9120 / AS9120: Aerospace quality management standards that support traceability and control in the supply chain for aerospace components.
• ISO 898-2: General mechanical properties of fasteners made of steel and other alloys, relevant for cross-referencing mechanical requirements.
• EN 3755: Standards covering fasteners made from nickel alloys for aerospace applications, providing further technical and materials guidance.

Summary

By specifying bihexagonal, self-locking, silver-plated nuts in a heat-resisting nickel base alloy, SIST EN 3013:2001 ensures safe, reliable, and high-performance fastener solutions for aerospace systems. Compliance with this standard supports the rigorous demands of modern aircraft design and maintenance, promoting operational safety and parts interchangeability in the global aerospace industry.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Nuts, bihexagonal, self-locking, in heat resisting nickel base alloy NI-P101HT (Waspaloy), silver plated - Classification: 1 210 MPa (at ambient temperature) / 730°CLuft- und Raumfahrt - Zwölfkantmuttern, selbstsichernd, aus hochwarmfester Nickelbasislegierung NI-P101HT (Waspaloy), versilbert - Klasse: 1 210 MPa (bei Raumtemperatur) / 730 °CSérie aérospatiale - Ecrous bihexagonaux, a freinage interne, en alliage résistant a chaud
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