[NLRS] 4-40 tap AND

[Dr. Gerald N. Johnson]

On Sun, 2007-02-11 at 16:26 -0500, W0ZQ at aol.com wrote:
> 
> Anyone know of a good source for a 4-40 drill  and tap ?   I suppose Hub 
> Hobby ?   I looked at DigiKey and  did not see a listing for taps.
> 
> 73, Jon
> W0ZQ
> 
If you are tapping aluminum increase the tap drill size 3 or 4 numbers
to keep the tap from extruding more than full threads and jamming.
Kerosene makes a pretty cutting oil for aluminum.

73, Jerry, K0CQ