Hillman 3/8-in-16 Hot-Dipped Galvanized Round-Head Standard (SAE) Carriage Bolt

3/8-in-16 Hot-Dipped Galvanized Round-Head Standard (SAE) Carriage Bolt Carriage bolts have a smooth, rounded head that has a small square section underneath They are used in wood connections utilizing the square neck under the round head which will sit into the hole to prevent the head from turning Galvanized Superior weather resistance Hillman 3/8-in-16 Hot-Dipped Galvanized Round-Head Standard (SAE) Carriage Bolt.