On Dec 16, 8:38*am, The Daring Dufas
wrote:
On 12/16/2010 7:24 AM, notbob wrote:



A couple decades ago, I ran across a handfull of self-tapping screws.
They were like sheet metal screws, but with skirted hex heads. *These
were about 1/2" long and 1/4" dia. *I'd seen them used with a special
head on a drill motor, it having a hex chuck that would ratchet when the
screw bottomed out. *What amazed me about these was the fact they where
not only self-starting AND self-tapping, but they where pretty damn
hard. *In experimenting, I discovered they tapped and screwed into an
old BSA motorcycle frame like it was soft pine.

I now find myself in need of something like this and was wondering just
what, exactly, do I ask for when I go down to the hardware store.

nb

Most guys in the trades call them Tek screws.

http://www.imperialinc.com/grp076.shtml

TDD

I just used some self-tapping screws for a project that I bought at
Lowes. They included
a rubber washer and a metal washer, already installed on the screw.
They go in using
a driver/drill. The rubber washer gives it some give and I used them
to fasten plastic
conduit clamps.