On 02/14/2014 09:41 AM, geneb wrote:
  Do you know what the "official" name for
those are?  I'd like to get
 some ordered... 
The name "plastite" pops up as a trade name, but that's only one
manufacturer's brand.  Google for "screws for plastic" and you'll get a
bunch of hits.
  I often use brass heat-set inserts in the 3D parts I
print and they work
 very, very well. 
My concern is that using inserts in old, more brittle thermoplastics
might not be very rewarding.  But YMMV, as they say.
--Chuck