These carriage bolts feature a 1/2 in. diameter and a length of 5-1/2 in. They are made from Grade 2 / A307 steel and come with a zinc plated finish. The coarse thread size is 13, and the square depth is 9/32 in., designed to prevent turning when the nut is tightened.

• A carriage bolt has a domed or countersunk head and the shank is topped by a short square section under the head
• The square section grips into the part being fixed (typically wood) preventing the bolt from turning when the nut is tightened
• Durable construction for reliable fastening in various applications