ISO 8750 spiral pin, 4 x 20 mm, Article number 8750A104020. Made in stainless steel aisi 301/en 1.4310. Spiral Pin manufactured to ISO 8750. 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.