EN 15048 hexagon structural bolt, M16 x 50, bolt and nut set (iso 4017 bolt, en 15048 assembly), Article number SB40178U160502. Property class / material: steel 8.8, surface finish hot-dip galvanised. Hexagon Structural Bolt manufactured to EN 15048 with ISO metric (M) thread, coarse pitch, fully threaded. Standard parts to the same standard, property class, dimensions and surface finish are interchangeable between manufacturers; confirm the controlling standard revision, any class-society or application approval, and the mating thread before substitution.