Hillman 240024 Zinc Carriage Bolt (1/4" x 2")

Product Description 100 Pack, 1/4-20 X 2-1/2" Carriage Bolt, Steel Round Head, Square Neck, Coarse Thread. From the Manufacturer 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. These carriage bolts come plated in zinc for moderate corrosion resistance.