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
PROJECT
dnaSRPS EN 4131:2025
50.20
Proof sent to secretariat or FDIS ballot initiated: 8 weeks
May 7, 2026
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