"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???

Rich S.