Bearing Plates give greater bearing surface than standard cut washers. They are designed to help strengthen and distribute the load at these critical connections. Bearing Plates are typically used on foundation anchor bolts in place of cut washers. Bolt Diameter: 1/2 in.The BP1/2-3 and BP5/8-3 are 3" x 3" bearing plates that meet the latest requirements of the IRC and IBC.These plate washers are available uncoated or with a hot-dip galvanized (HDG) coating.