Driving sheet-metal screws into 4130

"O-ring Seals" wrote in message
...
On Mon, 2 Feb 2004 17:14:34 -0800, "Rich S."
wrote:

"O-ring Seals" wrote in message
...

The area where he is placing the screws is in structural fuselage
tubing. I feel that the hole size required for rivnuts might
compromise the integrity of the tubing. He is adding a new set of
holes as it is. Best to get some number sized drill bits ( 1/64" one
way or the other may not work ) and practice on some scrap tubing to
find the one that works.

Gotcha, Bob. Mebbe he just needs one those rare "sheet metal screw"
taps???

Now that you mention it, a self-tapping sheet metal screw of some type
might work.

Be sure the self tapping screw is driven straight.