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Railway applications - Compatibility between rolling stock and train detection systems - Part 2: Compatibility with track circuits. Original standard UNE-CLC TS 50238-2-2026 in PDF full version. Additional info + preview on request

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Aerospace series. Bolt, normal hexagon head, relieved shank, long thread, in heat resisting steel FE-PA2601 (A286), silver plated. Classification: 1 100 MPa/650 °C. Original standard UNE-EN 3687-2026 in PDF full version. Additional info + preview on request

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Aerospace series - Nut, anchor, self-locking, fixed, 90° corner, reduced series, with counterbore, in heat resisting steel, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C. Original standard UNE-EN 3750-2026 in PDF full version. Additional info + preview on request

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Aerospace series - Steel 40CrMoV12 (1.8523) - Consumable electrode remelted - Hardened and tempered - Forgings - De ? 50 mm. 1 250 MPa ? Rm ? 1 400 MPa. Original standard UNE-EN 4098-2026 in PDF full version. Additional info + preview on request

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Aerospace series. Bolt, normal hexagonal head, coarse tolerance shank, short thread, in heat resisting nickel base alloy, aluminium IVD coated. Classification: 1 250 MPa (at ambient temperature)/425 °C. Original standard UNE-EN 4128-2026 in PDF full version. Additional info + preview on request

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Aerospace series. Screws 100° countersunk normal head, offset cruciform recess, coarse tolerance normal shank, long thread, in alloy steel, cadmium plated. Classification: 1 100 MPa (at ambient temperature) / 235 °C. Original standard UNE-EN 4163-2026 in PDF full version. Additional info + preview on request

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