... M2-M8,#4-#10 4.Kinds of washer High Quality Combination Screw 1. Head type of Combination ... Screw:ASTM/JIS pan head,hex head,.high round head,cheess head,flat head...ect..2 ... Plain, black finished, Zinc plated (Galv), Nickel, phosphate black, 3Cr zinc,Passivation8. Packing of Combination Screw:General ... 0.5mm0.8mm 1.0mm 1.2mm 1.6mmFLAT WASHER DIA 7mm 7mm 8mm 12mm 15mm High Quality Combination ...