[Content:]
40pcs --- M2 x 8mm
40pcs --- M2 x 12mm
40pcs --- M2 x 16mm
40pcs --- M2 x 20mm
80pcs --- M2 Flat Washers
80pcs --- M2 Hex Nuts
【❉】M2 Set in total 400pcs

30pcs --- M3 x 8mm
30pcs --- M3 x 12mm
30pcs --- M3 x 16mm
30pcs --- M3 x 20mm
60pcs --- M3 Flat Washers
60pcs --- M3 Hex Nuts
【❉】M3 Set in total 240pcs

30pcs --- M4 x 8mm
30pcs --- M4 x 12mm
30pcs --- M4 x 16mm
30pcs --- M4 x 20mm
60pcs --- M4 Flat Washers
60pcs --- M4 Hex Nuts
【❉】M4 Set in total 240pcs

15pcs --- M5 x 8mm
15pcs --- M5 x 12mm
15pcs --- M5 x 16mm
15pcs --- M5 x 20mm
40pcs --- M5 Flat Washers
40pcs --- M5 Hex Nuts
【❉】M5 Set in total 140pcs

About Countersunk Screws:
A countersunk screw is a type of fastening that sits flush with the surface of the material it occupies.
These screws typically are used so that you can cover them easily with either a screw cap or piece of wood.
Other applications include the need for a fastening not to protrude so other objects can rest upon it stably, or to fasten it further to another object.