Screw M2 x 4 flat head
Stainless steel - M2 x 4 mm - for tip or allen screwdriver of 1,5 mm - bag with 20 units
Remember that if you do not use lock washer, you can use the 3 or 4 mm. long but if you use washers Grower or star type you should use the 5 mm. of length.