I'm designing an enclosure which doesn't use any fasteners. Two components fit together like a plastic box and its lid. However, instead, the lid has tongues which are squeezed into the slots on the base walls. The tongues are 0.6mm bigger than the slots. The base material is Aluminium, the lid material is Polycarbornate.
I tried finding interference fits online but all the information I could find was for shafts and circular objects.
I cant post the original part but here is an edited version to show what I'm asking guidance in.
My question is: What size interference do I need for a tight push in fit?