SIST EN 3377:2001

Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel FE-PA92HT (A 286) - Classification: 1 100 MPa (at ambient temperature)/425°C

This standard specifies the characteristics of self-locking hexagonal nuts in FE-PA92HT for aerospace applications. Classification: 1 100 MPa / 425 °C

Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA92HT (A286) - Klasse: 1 100 MPa (bei Raumtemperatur)/425°C

Diese Norm legt die Eigenschaften von selbstsichernden Sechskantmuttern, aus FE-PA92HT, zur Verwendung in der Luft- und Raumfahrt fest. Klasse: 1 100 MPa / 425 °C

Série aérospatiale - Ecrous hexagonaux, a freinage interne, en acier résistant a chaud FE-PA92HT (A286) - Classification: 1 100 MPa (a température ambiante)/425°C

La présente norme spécifie les caractéristiques des écrous hexagonaux, à freinage interne, en FE-PA92HT, pour les applications aérospatiales. Classification: 1 100 MPa / 425 °C

Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel FE-PA92HT (A 286) - Classification: 1 100 MPa (at ambient temperature)/425°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 3377:1996 - Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel FE-PA92HT (A 286) - Classification: 1 100 MPa (at ambient temperature)/425°C

Overview

SIST EN 3377:2001 is a recognized European standard developed by CEN, establishing the specifications for self-locking, hexagonal nuts made of heat resisting steel FE-PA92HT (A 286). With a classification of 1 100 MPa at ambient temperature and up to 425°C, this standard ensures that fasteners are suitable for use in demanding aerospace applications. The document outlines both mechanical properties and performance criteria, supporting the safety and reliability of aerospace assemblies where extreme temperatures and stress resistance are critical.

Key Topics

• Material Specification: Self-locking hexagonal nuts manufactured from FE-PA92HT (A 286), a high-strength, heat-resistant steel alloy.
• Performance Classification: Rated for 1 100 MPa tensile strength at ambient temperature and effective operation at temperatures up to 425°C.
• Design and Dimensions: Standardizes geometrical features, ensuring compatibility and interchangeability across aerospace components.
• Self-Locking Mechanism: Incorporates features preventing loosening under vibration or thermal cycling, improving reliability in critical assemblies.
• Quality Assurance: Includes requirements for inspection, testing, and traceability to maintain consistent manufacturing quality.
• Compliance: Facilitates conformity to international aerospace engineering standards, supporting global procurement and maintenance.

Applications

The SIST EN 3377:2001 standard serves vital functions in the aerospace industry, where secure, high-strength fasteners are indispensable. Key applications include:

• Aircraft Engine Assemblies: Employed in locations where high thermal loads and mechanical vibrations are present, such as turbine housings and exhaust systems.
• Airframe Fastening: Suitable for structural connections in airframes exposed to fluctuating temperatures and substantial mechanical stress.
• Spacecraft Structures: Used in satellite and launcher assemblies that require performance reliability in extreme environments.
• Maintenance and Repairs: Enables maintenance teams to source and specify replacement nuts confidently, knowing they meet strict industry requirements.

By adhering to this standard, aerospace manufacturers and maintenance providers ensure safety, longevity, and interchangeability of critical components.

Related Standards

For comprehensive aerospace fastener compliance and system compatibility, consider these related international standards:

• EN 3645: Aerospace series - Tapered fasteners for high-temperature applications
• EN 2874: Aerospace series - Self-locking nuts, hexagonal, high temperature
• EN 2157: Aerospace series - Threads and thread tolerances for aerospace fasteners
• ISO 898-2: Mechanical properties of fasteners made of carbon steel and alloy steel - Nuts with specified proof load
• NASM25027: Aerospace self-locking nuts performance specification

Adoption of SIST EN 3377:2001 and relevant standards streamlines procurement, enhances operational safety, and ensures compliance with global aerospace quality requirements.

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Keywords: SIST EN 3377:2001, self-locking hexagonal nuts, FE-PA92HT, A286 steel, aerospace fasteners, heat resisting steel, 1 100 MPa, 425°C, CEN standard, aircraft nuts, aerospace hardware, high temperature fasteners, international standards, quality assurance

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel FE-PA92HT (A 286) - Classification: 1 100 MPa (at ambient temperature)/425°CLuft- und Raumfahrt - Sechskantmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA92HT (A286) - Klasse: 1 100 MPa (bei Raumtemperatur)/425°CSérie aérospatiale - Ecrous hexagonaux, a freinage interne, en acier résistant a chaud F
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