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Aerospace series. Heat resisting alloy X12CrNiCoMoW21- 20. Solution treated and precipitation treated. Forgings. De ≤ 100 mm. Original standard UNE-EN 4574-2020 in PDF full version. Additional info + preview on request

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Aerospace series. Heat resisting alloy X12CrNiCoMoW21-20. Solution treated and descaled. Sheets and plates. 3 mm < a ≤ 50 mm. Original standard UNE-EN 4575-2020 in PDF full version. Additional info + preview on request

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Hearing protectors. Recommendations for selection, use, care and maintenance. Guidance document. Original standard UNE-EN 458-2025 in PDF full version. Additional info + preview on request

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Aerospace series. Cable, electrical, for signal transmission - Technical specification. Original standard UNE-EN 4604-001-2019 in PDF full version. Additional info + preview on request

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Aerospace series. Spiral drive recesses for threaded fasteners. Geometrical definition and technical requirements. Original standard UNE-EN 4609-2019 in PDF full version. Additional info + preview on request

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Aerospace series. Modular and Open Avionics Architectures - Communications/Network. Original standard UNE-EN 4660-003-2019 in PDF full version. Additional info + preview on request

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