On Jun 29, 2:45 pm, wrote:
Anyone have experience with small tapcon concrete screws? 1/4" head,
about 2" length. I can't get them in.

snip

My floor has several holes
with snapped off anchors now.

For small screws like that it is a whole lot easier to just drill a
hole and set a regular Grade 5 threaded stud in the clean hole with a
dollop of 2-part epoxy. The bond to concrete is tremendous. Tapcons
and redheads are great products, but in smaller sizes and low strength
concrete epoxy is superior. HTH

Joe