DIN 7504-M rounded head self-tapping screw with phillips, ST4.8 x 22, phillips, Article number 7504N480221. Property class / material: steel, surface finish zinc plated. Rounded Head Self-Tapping Screw with Phillips manufactured to DIN 7504-M with ISO 1478 tapping screw thread (ST) 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.