Electronic – How to fix a PCB inside this enclosure

enclosureprotoboard

This is a related question to How to fix this in an enclosure without glueing.

However, for a protoboard/PCB, how could I attach it to the enclosure? The bottom of the enclosure has holes for attaching, but it doesn't have screw thread. How should these holes be used and how can I attach a PCB?

Glueing is not what I want, in case I want to add/change components on the protoboard later.

enter image description here

Best Answer

The small standoffs molded into the bottom of that plastic box can be used with the proper sized metal machine screws. The screws will cut their own thread in the soft plastic. There are several things to consider:

  1. Make sure to select the proper diameter machine screw.
  2. Make sure to select a machine screw that is not too long. If too long it can bottom out in the hole and strip (see next item) or even make the plastic in the other side have a bump out.
  3. Use care to not over torque the machine screws. It is relatively easy to strip out the holes.
  4. When re-mounting an item and re-using a mounting hole that was previously threaded use care to try to get the screw thread to reengage the existing threads instead of trying to form new ones.