DIN 571 hexagon head wood screw, 16 x 240 mm, Article number 571162402. Property class / material: steel, surface finish hot-dip galvanised. Hexagon Head Wood Screw manufactured to DIN 571 with ISO metric (M) thread, coarse pitch, partially 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.