» Countersunk Bolts Portland Bolt
Countersunk bolts are used when a smooth surface is required. Common applications include bridge decking, walkways, and railing. Manufacturing Portland Bolt manufactures countersunk bolts from 1/2″ diameter through 11/2″ diameter in most ASTM, AASHTO, and SAE specifications including, A307 Grade A, A449, and F3125 Grade A325.