What size bit is required for a 3/16-inch concrete screw?

To properly install a 3/16-inch concrete screw, it is critical to select the correct size drill bit to ensure proper insertion and hold. A 3/16-inch concrete screw typically requires a pilot hole that is slightly smaller than the screw itself to allow for a secure grip once installed. In this case, a 5/32-inch bit is the correct size, as it creates a hole that allows the threads of the concrete screw to cut into the surrounding concrete, ensuring a tight fit without excessive torque that could damage the screw or the mounting surface.

The other options would yield holes that are either too small or too large, resulting in inadequate support. Using a bit that is too small would make it challenging to insert the screw, while a larger bit would not provide sufficient material for the screw to anchor securely, risking failure of the fastening. Therefore, the choice of a 5/32-inch bit aligns with the standard practices for installing concrete screws correctly.