Reference details
- Reference
- EN 3721:1995
- Official title
- Aerospace series - Nuts, bihexagonal, self-locking, deep counterbored, in heat resisting steel FE-PA92HT (A286), MoS2 coated - Classification: 1 100 MPa (at ambient temperature) / 425 °C
- Organisation
- CEN
- Publisher status in source
- PublishedThis is the status recorded in the source, not a statement that this is the latest edition.
- Source access
- 19 October 2026
Research and application
Begin with the official scope and the product configuration. The title identifies a subject; it does not establish every product, use condition or legal requirement covered by the publication.
Product research routes
- Metals, welding and surface treatment
Material grade, joining process and surface condition as linked elements of technical performance.
- Marine, aviation and aerospace products
Equipment qualification and interface requirements in marine and aerospace service environments.
Questions for the evidence file
- Material certificates
- Process qualification
- Inspection records
- Surface-preparation and exposure conditions
- Configuration and installation basis
- Environmental qualification
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Legal citation
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