1/2 -13 x 5 Zinc Grade 5 Carriage Bolts CBS5-289 (25 pcs.)

Diameter: 1/2 Length: 5 Material: Steel Finish: Zinc Head Style: Carriage Thread Size: 13 (Coarse) Thread Length: Full Hardness: Grade 5 Type: Carriage Bolt Square-Depth: 9/32 Box of 25. 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.