Not the usual nylon or whatever ones that I never trust for high
temperatures (soften and deform over time, loosening thermal connection,runs
hotter, melts more ......
Does anyone make them from whatever the plastic/mineral? is used for the
body of power transistors themselves, what is that material , what is it
called? . Maybe because of brittleness they would have to use smaller
screws/bolts allowing larger washer thickness in the hole.
I've got in the habit of cutting off the non-metal mounting parts of TOP66
type transistors, opening the holes of TO220 or TOP3 and using them as
washers.

Or any other solution, modification?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/