Driving-Patio-Table-Carriage-Bolt Published January 15, 2013 at 300 × 308 in Making a Patio Furniture Table and Bench Set 4. Place the tabletop onto the base and fasten it down with carriage bolts, washers and wing nuts. Secure the top to the leg framework with carriage bolts, washers and wingnuts. They should only be tightened finger tight