Heatsink question

It's a stamped sink, so on each bolt use a washer on the bottom of the sink, then the nut,
and torque it down good. Then put the ends of the bolts through the pcb and fasten the
TO-3/sink assembly to the board with two more washers and nuts, before soldering the pins.
This way there's some air space under the sink for ventilation.
 
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