On 7/11/2015 9:25 AM, gary wrote:
The screw I need will go through one "leg" of a "C"-bracket and into a 3/4" thick particle board (without going through the board,

The 5mm x 40mm screws your recommend have nominal length of 1 1/2" for use with 1/2" thick materials.


What I was recommending was confirmat screws and drill bits for these
screws. They come in all sizes.

I figured you would be able to determine the correct length, I was not
suggesting any particular length, just answering the questions that you
asked.