DIN 7984 socket head screw with hex drive, 08.8 M5 x 40, Article number 79848050401. Property class / material: steel 8.8, surface finish zinc plated. Socket Head Screw with Hex Drive manufactured to DIN 7984 with ISO metric (M) thread, coarse pitch, partially 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.