DIN 913 set screw with hex drive and flat-tip, M4 x 8, flat point, Article number 913040081. Property class / material: steel 45h, surface finish zinc plated. Set Screw with Hex Drive and Flat-Tip manufactured to DIN 913 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.