DIN 7 dowel pin, 2.5 x 4 mm, m6 tolerance, Article number 7A40250047. Made in stainless steel a4, surface finish black oxide. Dowel Pin manufactured to DIN 7. 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: positioning, alignment and locking of machine elements, shafts and fittings in machine building, plant maintenance and marine equipment.