Hexagon head screws similar to DIN 933 Stainless steel A2 1/2" UNF x 3" = 800 pcs. Hexagon head screws similar to DIN 933 Stainless steel A3 1/2"UNF x 57 ( o 1/2"UNF x 2 e 1/4") = 400 pcs. Self locking hexagon nuts similar to DIN 982 1/2" UNF = 1200 pcs.