DIN 908 hexagon socket screw plug, M18 x 1.5, Article number 908A21815. Made in stainless steel a2. Hexagon Socket Screw Plug manufactured to DIN 908 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.