Space the holes evenly, then bolt the stringers temporarily with 3/8-inch-diameter carriage bolts, flat washers and nuts.
And he had to bore holes to fit the signs to poles with carriage bolts.
The legs can be secured with carriage bolts fastened by nuts and washers.
First attach the door bracket to the door with carriage bolts.
Insert the carriage bolts from the outside.
Fasten the posts together with galvanized carriage bolts.
Drill a hole through the door and insert the carriage bolt from the outside; secure it with a nut and washer from the inside.
Bolt the posts together with galvanized carriage bolts with wide, flat washers.
The switchboard built by Coy was, according to one source, constructed of "carriage bolts, handles from teapot lids and bustle wire."
Then install carriage bolts, three-eighths of an inch in diameter, using nuts and flat washers.