EN 2880:2018+AC:2019

• Abstract:

  This European standard specifies the characteristics of self-locking, fuel resistant, sealing, floating, two lug anchor nuts, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated.; Classification: 900 MPa/120 °C.

• Status: Published
• Publication Date: 09-Apr-2019
• Withdrawal Date: 30-Oct-2019
• ICS: 49.030.30 - Nuts
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3/S 2 - Fasteners
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 21-Jan-2025
• Completion Date: 02-Sep-2026
• Ref Project: SIST EN 2880:2018+AC:2019 - Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS₂ lubricated - Classification: 900 MPa (at ambient temperature) / 120 °C

• Merged From: EN 2880:2018 - Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS₂ lubricated - Classification: 900 MPa (at ambient temperature) / 120 °C
• Effective Date: 16-Jan-2023
• Refers: ISO 5855-2:1999 - Aerospace — MJ threads — Part 2: Limit dimensions for bolts and nuts
• Effective Date: 25-Aug-2026
• Refers: ISO 5858:1999 - Aerospace — Nuts, self-locking, with maximum operating temperature less than or equal to 425 degrees C — Procurement specification
• Effective Date: 25-Aug-2026
• Refers: ISO 8788:2000 - Aerospace — Nuts, metric — Tolerances of form and position
• Effective Date: 25-Aug-2026
• Refers: ISO 8940:2002 - Aerospace — Nuts, anchor, self-locking, sealing, floating, two-lug, with counterbore, with MJ threads, classifications: 900 MPa (at ambient temperature)/120 degrees C, 900 MPa (at ambient temperature)/175 degrees C and 900 MPa (at ambient temperature)/235 degrees C — Dimensions
• Effective Date: 25-Aug-2026
• Refers: EN 2133:2020 - Aerospace series - Cadmium plating of steels with specified tensile strength ≤ 1 450 MPa, copper, copper alloys and nickel alloys
• Effective Date: 28-Jan-2026
• Refers: EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026
• Refers: EN 9133:2018 - Aerospace series - Quality Management Systems - Qualification Procedure for Aerospace Standard Products
• Effective Date: 28-Jan-2026
• Refers: EN ISO 15792-1:2008 - Welding consumables - Test methods - Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel alloys (ISO 15792-1:2000)
• Effective Date: 28-Jan-2026
• Refers: EN 9100:2018 - Quality Management Systems - Requirements for Aviation, Space and Defence Organizations
• Effective Date: 28-Jan-2026
• Refers: EN 840-6:2004+A1:2008 - Mobile waste containers - Part 6: Safety and health requirements
• Effective Date: 28-Jan-2026
• Refers: EN 2491:2011 - Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
• Effective Date: 28-Jan-2026
• Refers: EN ISO 4628-8:2012 - Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect (ISO 4628-8:2012)
• Effective Date: 28-Jan-2026
• Referred By: EN ISO 536:2020 - Paper and board - Determination of grammage (ISO 536:2019)
• Effective Date: 28-Jan-2026

Overview

EN 2880:2018+AC:2019 is a critical European standard developed by CEN for the aerospace industry, specifying the requirements for anchor nuts that are self-locking, fuel resistant, sealing, floating, with two lugs and a counterbore, manufactured in alloy steel, cadmium plated, and MoS₂ lubricated. These anchor nuts are designed for high reliability under demanding operating conditions, classified for a minimum tensile strength of 900 MPa at ambient temperature and capable of withstanding up to 120°C.

These components play a key role in aerospace applications where secure, vibration-resistant, fuel-tight fastening is necessary, contributing to both safety and performance in aircraft, helicopters, and other aerospace systems.

Key Topics

• Self-Locking Mechanism: Provides resistance to loosening under vibration, essential in dynamic aerospace environments.
• Fuel Resistance: Utilizes a sealing ring made of rubber per MIL-R-6855, ensuring compatibility with aviation fuels and preventing leaks.
• Sealing and Floating Features: Offers a secure seal against fluid ingress and compensates for slight misalignment between parts, thanks to its floating design.
• Material and Surface Treatments: Made from high-strength alloy steel for durability, with cadmium plating (EN 2133) for corrosion resistance, and MoS₂ lubrication (EN 2491) for smooth installation and operation.
• Two-Lug Anchor and Counterbore: Enables secure and robust mounting to aircraft structures, suitable for applications where access is limited to one side.
• Classification: Rated for 900 MPa minimum tensile strength at ambient temperature and operational integrity up to 120°C.

Applications

EN 2880 anchor nuts are widely used in the following aerospace scenarios:

• Aircraft Structures: Fastening panels, covers, and access doors where fuel resistance and vibration-proof performance are required.
• Helicopter Assemblies: Mounting critical components exposed to fuel, heat, and mechanical stress.
• Fuel Systems: Ensuring leak-proof connections in fuel tanks and lines, where resistance to aviation fuel and sealed performance are crucial.
• Maintenance and Retrofit: Used where high reliability and standardization are important for safety and interchangeability during repairs or component upgrades.

The standard ensures that nuts meeting its requirements are interchangeable, reliable, and compatible with international aerospace assembly procedures, making them essential for manufacturers and maintenance teams.

Related Standards

For comprehensive compliance and compatibility, consider the following related standards:

• EN 2133: Aerospace series - Cadmium plating of steels with specified tensile strength ≤ 1450 MPa.
• EN 2424: Aerospace series - Marking of aerospace products.
• EN 2491: Aerospace series - Molybdenum disulphide dry lubricants - Coating methods.
• EN 9100: Quality Management Systems - Requirements for aviation, space, and defence organizations.
• EN 9133: Qualification procedure for aerospace standard products.
• ISO 5855-2: Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts.
• ISO 5858: Aerospace - Nuts, self-locking, with a maximum operating temperature ≤ 425°C.
• ISO 8788: Metric nuts - Tolerances of form and position.
• ISO 8940: Nuts, anchor, self-locking, sealing, floating, with MJ threads.
• TR 3791: Materials for self-locking nuts and threaded inserts, temperature classes up to 425°C.

Conclusion

EN 2880:2018+AC:2019 ensures high standards of performance, safety, and compatibility for aerospace anchor nuts. Its rigorous requirements allow manufacturers and maintenance teams to reliably select, install, and maintain critical fasteners in fuel-exposed and high-stress environments, supporting the long-term integrity of aerospace structures and components.