EN 3723:1996
(Main)Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel, FE-PA92HT (A286), MoS2 coated - Classification: 1 100 MPa (at ambient temperature)/425°C
Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel, FE-PA92HT (A286), MoS2 coated - Classification: 1 100 MPa (at ambient temperature)/425°C
This standard specifies the characteristics of self-locking hexagonal nuts in FE-PA92HT, MoS2 coated, for aerospace applications. Classification: 1 100 MPa / 425 °C
Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA92HT (A286), MoS2 beschichtet - Klasse: 1 100 MPa (bei Raumtemperatur)/425°C
Diese Norm legt die Eigenschaften von selbstsichernden Sechskantmuttern aus FE-PA92HT, MoS2 beschichtet, zur Verwendung in der Luft- und Raumfahrt fest. Klasse: 1 100 MPa / 425 °C
Série aérospatiale - Ecrous hexagonaux, à freinage interne, en acier résistant à chaud FE-PA92HT (A286), revêtus MoS2 - Classification: 1 100 MPa (à température ambiente)/425°C
La présente norme spécifie les caractéristiques des écrous hexagonaux, à freinage interne, en FE-PA92HT, revêtus MoS2, pour les applications aérospatiales. Classification: 1 100 MPa / 425 °C
Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel, FE-PA92HT (A286), MoS2 coated - Classification: 1 100 MPa (at ambient temperature)/425 °C
General Information
- 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
- 21-Jan-2026
Relations
- Effective Date
- 28-Jan-2026
Overview
EN 3723:1996 is a European standard developed by CEN focusing on aerospace-grade hexagonal self-locking nuts manufactured from heat-resisting steel FE-PA92HT (A286) with a MoS2 (molybdenum disulfide) coating. These components are classified for high-performance applications requiring strength of 1,100 MPa at ambient temperature and operational capability up to 425°C. This standard specifies the technical and material characteristics to ensure reliability, durability, and safety in aerospace assemblies.
Key Topics
- Material Specifications: The nuts are made from FE-PA92HT (A286), a high-strength, heat-resistant alloy known for its excellent mechanical properties and corrosion resistance at elevated temperatures.
- Self-Locking Feature: Integrated self-locking mechanisms provide secure fastening and resistance to loosening due to vibration or thermal cycling, critical in aerospace environments.
- MoS2 Coating: The molybdenum disulfide coating reduces friction during assembly and operation, improving wear resistance and extending component lifespan.
- Mechanical Classification: Nuts are rated to withstand tensile stresses of 1,100 MPa at room temperature and maintain integrity up to 425°C.
- Hexagonal Design: The conventional hexagonal shape facilitates ease of installation with standard tools, enabling compatibility with existing aerospace hardware.
Applications
EN 3723:1996-certified nuts are primarily designed for aerospace industry uses, where components must endure extreme conditions without compromising safety or performance:
- Aircraft Engines: Securing critical engine components exposed to high temperatures and mechanical stresses.
- Structural Fastening: Joining airframe parts that demand high strength and resistance to thermal fatigue.
- Spacecraft Assembly: Reliable fastening in spacecraft where exposure to temperature extremes and vibration is common.
- High-Temperature Mechanical Systems: Any aerospace systems that operate in environments approaching or exceeding 400°C can benefit from these nuts.
The standard ensures these fasteners meet stringent quality and performance benchmarks required for aerospace certification and operational safety.
Related Standards
- EN ISO 898-2 - Mechanical properties of nuts used in aerospace applications.
- EN 22384 - Aerospace fasteners made of corrosion-resistant steels.
- ASME B18.2.2 - Hex nuts including self-locking variants for aerospace grade hardware.
- ISO 4161 - Specification for prevailing torque hexagon nuts, including locking characteristics.
- FE-PA92HT Material Standards - Covering chemical composition and heat treatment processes relevant to A286 alloy.
By aligning with EN 3723:1996, manufacturers and engineers can ensure compatibility and compliance with related standards governing aerospace fasteners, promoting safety, quality, and operational reliability.
Keywords: EN 3723:1996, aerospace nuts, self-locking hex nuts, FE-PA92HT, A286 steel, MoS2 coating, heat resisting steel, high-temperature fasteners, aerospace fasteners, hexagonal nuts, locking nuts, tensile strength 1100 MPa, aerospace hardware, temperature 425°C.
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Frequently Asked Questions
EN 3723:1996 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 (A286), MoS2 coated - 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, MoS2 coated, for aerospace applications. Classification: 1 100 MPa / 425 °C
This standard specifies the characteristics of self-locking hexagonal nuts in FE-PA92HT, MoS2 coated, for aerospace applications. Classification: 1 100 MPa / 425 °C
EN 3723:1996 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 3723:1996 has the following relationships with other standards: It is inter standard links to EN 16062:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3723:1996 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 (A286), MoS2 coated - Classification: 1 100 MPa (at ambient temperature)/425 °CLuft- und Raumfahrt - Sechskantmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA92HT (A286), MoS2 beschichtet - Klasse: 1 100 MPa (bei Raumtemperatur)/425°CSérie aérospatiale - Ecrous hexagonaux, a freinage interne, en acier résistant a chau
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