PCB Stand off for M4 Screws

A 3 level PC Stand off for attaching a PCB onto a surface with an M4 screw. The inner wall has multiple facets to allow easy cutting of the M4 Thread. Levels are 2mm, 10mm and 18mm from surface of board. Gives a strong hold. Drill hole for screw should be centered 2mm from true edge of the PCB