A set of metric ISO screws (M4, M5, M6, M8, M10) for test purposes. The Zip Archive contains seperate STL files for each screw and also contains nuts. I built the parts with a special edition of netfabb studio. I chose to approximate circles by 120-gons and added a tolerance of 0.1 millimeters for the nuts. Printed with 0.1 millimeter layers the nuts and screws should fit together.