EN 3377:1996
(Main)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
- Abstract
This standard specifies the characteristics of self-locking hexagonal nuts in FE-PA92HT for aerospace applications. Classification: 1 100 MPa / 425 °C
- Status
- Published
- Publication Date
- 19-Mar-1996
- Withdrawal Date
- 29-Sep-1996
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 31-May-2017
- Completion Date
- 23-Sep-2026
Overview
EN 3377:1996 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 EN 3377:1996 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 EN 3377:1996 and relevant standards streamlines procurement, enhances operational safety, and ensures compliance with global aerospace quality requirements.
Keywords: EN 3377:1996, 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
Relations
- Effective Date
- 20-Jan-2026
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Frequently Asked Questions
EN 3377:1996 is a standard published by the European Committee for Standardization (CEN). Its full title is "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 covers: This standard specifies the characteristics of self-locking hexagonal nuts in FE-PA92HT for aerospace applications. Classification: 1 100 MPa / 425 °C
This standard specifies the characteristics of self-locking hexagonal nuts in FE-PA92HT for aerospace applications. Classification: 1 100 MPa / 425 °C
EN 3377:1996 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.
EN 3377:1996 has the following relationships with other standards: It is inter standard links to prEN 3377. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3377:1996 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 - 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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