Not sure that "formal" instructions are really necessary. My own informal isntructions 
might go something like this:

1. Bend leads just past neckdown to 90 degrees.
2. apply heatsink compound to screw tab (underside of TO-220)
3. Insert component.
4. Solder component.
5. Attach using screw/nut

Just make sure that your footprint has an appropriate distance between pads and 
heatsink screw hole.

I see your "footprint my (?might?) vary". That will probably lead to problems, 
regardless of any formal treatment...

aj

On 04:25 PM 12/11/2002 -0600, Michael Biggs wrote:
>Does anyone have any formal assembly instructions for a voltage regulator
>part in a TO-220 package that lays flat with the three pins are bent 90
>degrees and inserted into board and the base on a heat sinking pad secured
>by a screw and nut? I am curious to weather I should include a prepping
>distance on the pins fro the assembler? I'm sure each assemblers process
>might be different as well as my footprint my vary.
>Any help?
>Thanks 

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