If you're hesitant to make a permanent connection, these clips are very useful. With a pull-out resistance of 185 lb, they won't come undone accidentally!
Made from a thermoplastic resin, their functional temperature range is from -40°F to 100°F. Mounted horizontally, they make effective pivot hinges, and show no deterioration after 50,000 cycles. 3/4" wide by 3/4" high by 11/16" deep.
Mounts using screws or flat-head bolts (not included). Sold in packages of 10 sets.