Hexagon socket bolts are used either for through-fitting with a nut and washer or for screwing directly into threaded holes with a washer. Made of stainless steel quality A4 class 80, suitable for use outdoors, in salt water and acids Manufactured according to ISO4762 / DIN912 for A4-80 class 80 Sold individually: For larger quantities, please email an inquiry In the list you can see the thickness and length of the bolt.