Hexagonal screws, sometimes referred to as bolts, are used either for through-hole assembly together with a nut and washer or for screwing directly into threaded holes together with a washer. Manufactured from A2 grade stainless steel, suitable for outdoor use. Manufactured to ISO4017 for A2-70 Sold by the piece: For larger quantities, please email an inquiry The list shows the thickness and length of the bolt.