Here are the specifications for the single-piece (octagonal and round) backboard wall mounting hardware:

2: #10 X 3 inch long flat head sheet metal, tapping or wood screws. Philips head are the easiest to drive.

(Please note: the threads of these screws are not intended to engage into the threads of the steel backboard wall mounting points.)

2: #10 plastic anchors. These will be needed for drywall, plaster, concrete and masonry wall surfaces. These will not be needed for wood walls.

The bristle dartboard hanging screw: This is the screw that installs into the middle back of the dartboard; the screw head then engages into the slot of the pre-installed, recessed metal bristle dartboard bracket at the center of the Dart-Stop backboard.
The screw we include is a #12 x 7/8 inch long pan head sheet metal screw. This size may be a little difficult to find however a similar size would also work; verify with your bristle dartboard the maximum length to avoid hitting it with your dart tip once it is installed.