DIN 84 rounded head screw with slot, M3 x 30, zini, tran, Article number 8403030ZNTF105. Property class / material: steel 4.8, surface finish zinc-nickel, silver. Rounded Head Screw with Slot manufactured to DIN 84 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.