I need to choose the right screws to install a child window guard into a wooden window frame.
The guard comes with one-way screws, but my 9 month old hasn't figured out the trigger on my Dewalt, so I want to use normal screws. I called the manufacturer but they are "unable to recommend screws other than those provided."
The screws look like 1" #10 sheet metal screws with either pan or truss heads (also below). This is a little odd because they recommend them even for wooden window frames.
The guard is constructed of square steel tubes with 3/8" holes on one side and 3/16" holes on the other (see below). The screws attach the guard to the window frame by passing first (and entirely) through the 3/8" hole, the threads and shank pass through the 3/16" hole and into the frame, and the head presses up against the inside of the tube around the 3/16" hole.
If this were any other application (i.e. one that isn't for preventing my child from falling to his death), I'd just get a round-head wood screw and call it a day. Instead, I don't know how to decide between:
- Round-head wood screw (since it's going into wood)
- Truss- or pan-head sheet metal screw (since that's what they provided)
- Roofing screws (since they are designed for attaching metal to wood)
- Something else I haven't thought of
What say you, oh wise DIY Stack Exchange?