Regarding this D-sub connector.
I have spent hours but cannot find the screw/fastener type used. I need to use mate it to a shell like this to make a cable:
This seems using same type of screw. The datasheet states as 4-40 UNC or M3 but it doesn fit and also the following screw is different than typical M3:
My problem is I cannot find the correct term fo the above screw or faster.
D-sub connectors use 4-40 fasteners, not metric ones.
You can find 4-40 jack-screws and other hardware here: https://www.digikey.com/short/qmtzrr1n
This one looks like yours:
https://www.digikey.com/en/products/detail/harting/09670029090/4322900
{Source: Digikey}
Here are some captive panel 4-40 screws:
You could buy another shell kit with all the appropriate screws. For example, here are the shells which were intended for your particular connector (same manufacturer). Molex p/n 1727040100, or Molex p/n 1727040099, or Molex p/n 1731110026 (different geometries, metalized or not)
If you just need to get by, then put large washers under the heads of the screws which you've already got. The screw heads will be sticking out, but the shell will hold together, and the connector will work electrically.
It depends on the expected standard of care.
