M1.6 screw and bolt sizes for the more common ones we deal with. This will give information about the maximum screw head heights and head diameters as well as the driver size needed to install or remove them. If unfamiliar with DIN and ISO numbers, they can be thought of as exact fastener names for each specific screw
M6 Stainless Steel Socket Head Cap Screws, A4 / 316 Marine, DIN
M1.6 x 4mm Phillips Pan Head Machine Screws (DIN 7985H) - A4
MonsterBolts - M1.6 x 6mm Socket Head Screws, DIN 912
MonsterBolts - M1.6 x 3mm Socket Head Screws, DIN 912
Metric Thread Pitch Table - Monster Bolts
MonsterBolts - M6 x 6mm Cup Point Set Screws, DIN 916
MonsterBolts - M6 x 6mm Socket Head Screws, DIN 912, Alloy Steel
M6 Flat Head Screws with Phillips Drive
MonsterBolts - M2.5 x 4mm Phillips Flat Head, DIN 965, Stainless
M1.6 Phillips Pan Head Machine screws Stainless Steel DIN 7985A Coarse