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prEN 3636 - Aerospace series - Screws, reduced pan head, offset cruciform recess, relieved shank, long thread, in heat resisting steel FEPA92HT (A286), silver plated - Classification: 900 MPa/650 °C
Ämnesområden: Bultar, skruvar
Kommittébeteckning: SIS/TK 643 (Rymdteknik)
Källa: CEN
Svarsdatum: den 18 nov 2025
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This document specifies the requirements for offset cruciform recess pan head screws with relieved shank and long thread in heat resisting steel FE-PA92HT, silver plated, tensile strength class 900 MPa at room temperature. The maximum test temperature of the material is 650 °C.

prEN 4131 - Aerospace series - Bolt, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at ambient temperature) / 425 °C
Ämnesområden: Bultar, skruvar
Kommittébeteckning: SIS/TK 643 (Rymdteknik)
Källa: CEN
Svarsdatum: den 18 nov 2025
Detaljer om förslaget
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This document specifies the characteristics of bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated. Classification: 1 250 MPa / 425 °C

prEN 3833 - Aerospace series - Bolts, MJ threads, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), passivated - Classification: 1 550 MPa (at ambient temperature)/650 °C - Technical specification
Ämnesområden: Bultar, skruvar
Kommittébeteckning: SIS/TK 643 (Rymdteknik)
Källa: CEN
Svarsdatum: den 9 jan 2026
Detaljer om förslaget
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This document specifies the characteristics, qualification and acceptance requirements for bolts with MJ threads in NI-PH2601, passivated, for aerospace applications. Classification: 1 550 MPa1/650 °C. It is applicable whenever referenced.