Hex socket screws :
Coffrets - Pack of 255 Assorted Hex Socket Round Head Screws, Black 8.8 Steel, DIN 912

DIN 912 8.8 :

25 M4X10        10 M5X25        10 M6X40

25 M4X12        10 M5X30        10 M8X20

25 M4X20        10 M6X12        10 M8X25

25 M4X25        10 M6X20        10 M8X30

25 M5X12        10 M6X25         3 M8X40 

25 M5X20        10 M6X30         2 M8X45    

= 255