DIN 6912 socket head screw with hex drive, 08.8 M20 x 45, Article number 69128200451. Property class / material: steel 8.8, surface finish zinc plated. Socket Head Screw with Hex Drive manufactured to DIN 6912 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.