DIN 7985-Z rounded head screw with phillips or pozidriv (form Z), M4 x 18, Article number 7985040181Z. Property class / material: steel 4.8, surface finish zinc plated. Rounded Head Screw with Phillips or Pozidriv manufactured to DIN 7985 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.