I'm working on a PCB that has through-hole components on both sides of the board. The "top" side of the board is mounted flush to a Delrin plastic block (the only top-side component is a gas sensor that is fed air samples through hose fittings in the plastic block).

The flush mounting means that I have to add grooves to the plastic block to accommodate the soldered pins of the bottom-side components. Assuming a standard 0.062" thickness FR4 board, how deep do I need to make the grooves in the plastic block? The only thing I could find is this NASA workmanship standard that states 0.5mm to 2.29mm, but I'm not sure if that will always hold true.


Question: Are scientifically detached professors referred to as ‘clinical’?
Answer: There can be clinical professors in fields other than medicine, though they may be labeled something else.  The definition of a "clinical professor" is not limited to medicine:  


  "The prefix Clinical identifies appointments that primarily provide practical instruction and application of practical knowledge. On the Medical Campus, the title describes faculty whose primary activity is limited to clinical or public health practice and associated teaching. The duties, terms of appointment, and salaries (if any) of such persons are specified in the letter of appointment. In general, the applicable rank and any subsequent promotions should be determined by the relevant academic achievements, professional accomplishments, and demonstrated effectiveness of the appointee."  (Boston University faculty handbook)


So, though I don't know much about engineering, I imagine that a professional from an engineering firm that specializes in a particular process could be hired as a clinical professor.  S/he would teach about the particular niche they occupy in the industry.