Using the wrong size can ruin the screw head.
The screw head broke off and the The bars moved a little.
They are also used with materials too thin to allow sinking screw heads flush.
For more complicated shapes two heading processes are required to get all of the features into the screw head.
"This has been added after the original construction," he said, pointing to the screw heads.
I looked closer, saw a screw head set flush with the aluminum surface.
Place a flat washer under each screw head before installing it.
The first is to counterbore the pocket hole itself, which houses the screw head within the member.
If screw heads are visible in the rose, tightening them may solve the problem.
When figuring, be sure to include the thickness of the screw head.