DIN 933 Hexagon head screws fully threaded M20x40, ASME SB-408 UNS N08810 (ALLOY 800H) - 20 pcs. DIN 934 Hexagon nuts M20, ASME SB-408 UNS N08810 (ALLOY 800H) - 20 pcs. DIN 125 / ISO 7089-7090 Flat washers for screws M20, ASME SB-408 UNS N08810 (ALLOY 800H) - 20 pcs.