Is this a flat head small screwdriver?

Yes, this is a flat head screw. It's suitable for the following machines: TS410, TS420, TS350AVE, TS360, FS300, FS350, 050, 051, FS160, FS180, FS400, FS450, FS480, TS350, FS500, FS550, FS550L, TS700, TS800, TS400, 08S, FR220