DIN 910-A hexagon head screw plug (form A), M20 x 1.5, Article number 91020151. Property class / material: steel, surface finish zinc plated. Hexagon Head Screw Plug manufactured to DIN 910 with ISO metric (M) thread, coarse pitch. 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. Applications: sealing of threaded ports in gearboxes, hydraulic and pneumatic equipment, engines and plant pipework.