DIN 906 hexagon socket pipe plug, conical thread, R 3/8", Article number 906A438. Made in stainless steel a4. Hexagon Socket Pipe Plug, Conical Thread manufactured to DIN 906 with ISO 7-1 taper pipe thread (R) 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.