ISO 10642 flat head screw with hex drive, 08.8 M20 x 60, Article number 79918200601. Property class / material: steel 8.8, surface finish zinc plated. Flat Head Screw with Hex Drive manufactured to ISO 10642 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.