When looking at 1478763-9 D-Sub Backshells from TE connectivity, you may spot that this backshell comes without threading. How do you assemble this backshell with the depicted screws if there’s no threading?
When you look at the part’s product drawing, it states that the screws are self tapping. A self-tapping screw is a screw that can tap its own hole and create its own threads as it is driven into the material. So this backshell is assembled with the screws it ships with, without pre-drilled threading. The screw’s own torque as it’s driven into the holes will create the threading for you.
For more information on how to assemble this backshell, please check TE’s:
assembly instruction sheet.